Texas instruments TI-NSPIRE HANDHELD Getting Started

Getting Started with the

TI-Nspire™ Handheld

This guidebook applies to TI-Nspire™ software version 3.0. To obtain the
latest version of the documentation, go to education.ti.com/guides.

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FCC Statement

Note: This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation.

If this equipment does cause harmful interference to radio or television
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on, the user is encouraged to try to correct the interference by one or
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• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

© 2006 - 2011 Texas Instruments Incorporated

ii

Contents

Important Information................................................................... ii

Getting started with the TI-Nspire™ handheld.....................1

About CAS....................................................................................... 1

TI-Nspire™ handheld keys ............................................................. 2

Preparing the handheld for use .................................................... 3

Turning on the TI-Nspire™ handheld for the first time............... 3

Using the TI-Nspire™ Touchpad .................................................... 5

Using the Home screen .................................................................. 6

Understanding the Scratchpad...................................................... 9

The TI-Nspire™ handheld screen................................................... 9

Using Hints.................................................................................... 10

Using the Scratchpad............................................................11

Opening and closing the Scratchpad .......................................... 11

Calculating with the Scratchpad ................................................. 12

Inserting items from the Catalog ................................................ 13

Viewing the history...................................................................... 17

Editing Scratchpad expressions ................................................... 18

Graphing with the Scratchpad .................................................... 19

Working with variables in the Scratchpad.................................. 23

Saving the Scratchpad contents .................................................. 23

Clearing Scratchpad contents...................................................... 24

Working with documents on the TI-Nspire™ handhelds....25

Opening a document ................................................................... 25

Creating a new document ........................................................... 26

Saving a document....................................................................... 26

Working with applications........................................................... 27

Using the Application menu........................................................ 32

Context menus.............................................................................. 33

Working with problems and pages............................................. 34

Adding a problem to a document............................................... 34

Viewing and reordering pages in a document........................... 35

Copying, pasting, and deleting problems................................... 38

Renaming a problem.................................................................... 39

Adding a page to a problem ....................................................... 39

Moving through pages in a document ....................................... 40

Managing documents .................................................................. 40

Closing a document...................................................................... 44

iii

Understanding the TI-Nspire™ tools...........................................44

Working in a TI-Nspire™ Navigator™ Teacher Software

classroom ........................................................................ 49

Logging in to class ........................................................................49

Pausing a class session ..................................................................50

Responding to Quick Poll questions............................................50

Configuring the TI-Nspire™ handheld ................................ 53

Installing the AAA batteries.........................................................53

Replacing AAA batteries ..............................................................55

Inserting your TI-Nspire™ Rechargeable Battery .......................55

Checking battery status................................................................ 57

Recharging the handheld.............................................................57

Changing handheld settings........................................................58

Changing the preferred language...............................................59

Customizing the handheld setup.................................................60

Customizing General settings ......................................................61

Customizing Graphs & Geometry settings ..................................65

Viewing handheld status..............................................................68

Using wireless communication hardware ...................................69

Connecting handhelds and transferring files .................... 71

Connecting handhelds..................................................................71

Transferring files to and from handhelds ...................................72

Transferring files between computers and handhelds............... 74

Handling errors resulting from sending folders .........................76

Memory and file management............................................ 81

Checking available memory.........................................................81

Freeing memory............................................................................82

Resetting the memory.................................................................. 84

Updating the handheld operating system.......................... 85

What you need to know ..............................................................85

Finding operating system upgrades ............................................86

Upgrading the Operating System................................................87

Upgrading the OS on multiple handhelds ..................................91

OS Upgrade Messages .................................................................. 91

iv

Using Keyboard Shortcuts....................................................95

Keyboard shortcuts ...................................................................... 95

Working in TI-84 Mode..........................................................99

Understanding dual-mode operation......................................... 99

TI-84 Plus Mode cables............................................................... 101

Capturing screens in TI-84 mode............................................... 101

Upgrading the TI-84 Plus OS...................................................... 102

Appendix: Service and Support .........................................103

Battery Precautions .................................................................... 103

Texas Instruments Support and Service..................................... 103

Index ....................................................................................105

v

vi

Getting started with the TI-Nspire™ handheld

The TI-Nspire™ handheld and the TI-Nspire™ CAS handheld are the
second generation handhelds in the TI-Nspire™ family of products. These
handhelds provide touchpad navigation, dynamic graphing, and
interactive computer features.

The handheld and the TI-Nspire™ software share the same functionality,
enabling you to transfer class assignments from the handheld to the
computer or transfer documents to the handheld when you need to be
mobile. Start assignments at school, then finish the work at home to take
advantage of the software’s full-color display and easy-to-use navigation.
Use the software to download the latest software and handheld
operating system updates as they become available to ensure you have
the latest enhancements.

This guide covers both the TI-Nspire™ handheld and the TI-Nspire™ CAS
handheld. While they operate identically in many ways, there are a few
distinctions. If the TI-Nspire™ CAS handheld has additional functionality,
it is pointed out and the CAS operation is described.

About CAS

With CAS, or the Computer Algebra System, you can:

• Perform both symbolic and numeric calculations.

• Factor and expand expressions and solve for common denominators.

TI-Nspire™ CAS technology makes it possible to recognize, simplify, and
calculate math expressions, preserving the symbols including variables
and terms such as “e” and p.

This ability to enter and view equations and expressions on screen as they
appear in textbooks is especially useful for step-by-step, arithmetic,

algebraic, and calculus calculations.

Getting started with the TI-Nspire™ handheld 1

TI-Nspire™ handheld keys

d Removes menus

or dialog boxes from
the screen. Also stops
a calculation in
progress.

Use the TI-Nspire™
Touchpad as you
would a laptop
touchpad. You can also
press the outer edges
to move right, left, up,
and down.

c Turns on the

handheld. If the
handheld is on, this
key displays the home
screen.

» Opens the

Scratchpad for
performing quick
calculations and
graphing.

e Moves to the

next entry field.

doc

/ Provides access to

the function or
character shown
above each key. Also
enables shortcuts in
combination with
other keys.

TI-Nspire Touchpad

g Makes the

next character typed
upper-case.

Note: A ¢ symbol on a key indicates access to multiple
options. To access an option, press º repeatedly or use
the arrow keys on the touchpad. Press · or click to
select the option.

~ Opens the

Document menu.

b Displays the

application or
context menu.

. Deletes the

previous character.

h Displays

stored variables.

· Evaluates an

expression,
executes an
instruction, or
selects a menu
item.

2 Getting started with the TI-Nspire™ handheld

Preparing the handheld for use

TI-Nspire™ handhelds are shipped with four alkaline AAA batteries and a
standard A male to mini B male USB cable. Handhelds can also be
powered using the TI-Nspire™ Rechargeable Battery or an approved wall
charger, which are sold separately.

Before using the handheld, either install the AAA batteries or install and
charge the TI-Nspire™ Rechargeable Battery (if purchased). You can also
connect your handheld to an external power source if you have the wall
charger.

Note: For more information about installing batteries, see Configuring
the TI-Nspire™ handheld.

Turning on the TI-Nspire™ handheld for the first time

1. Ensure that batteries have been installed or charged, or that the
handheld is connected to a power source.

2. Press c to turn on the handheld.

A progress bar displays while the operating system loads, then you
are prompted to choose preferences for language and font size.

To turn the handheld off, press
contents are retained.

Note: For more information about installing and charging batteries, see
Configuring the TI-Nspire™ handheld.

/c. The settings and memory

Using Automatic Power Down™

To prolong battery life, the Automatic Power Down™ (APD™) feature
turns off the handheld after three minutes of inactivity. When this

happens, press
document or menu accessed. To change the default setting, press

c to turn the handheld on and return to the last

c53 to access the Handheld Setup screen where you can

change the

Note: For more information about setting up the handheld, see
Configuring the TI-Nspire™ handheld.

Choosing a language

After the OS is loaded, select a preferred language.

Power Standby setting.

Getting started with the TI-Nspire™ handheld 3

1. Press ¢ to open the drop-down menu.

2. Press

3. Press

6 to scroll through the languages, then press x or · to

select a language.

e to highlight the OK button, then press x or · to save

the language selection.

Choosing a font size

Next, select a font size for the display.

1. Press

2. Press

3. Press

¢ to open the drop-down menu.

6 to highlight the font size, then press x or · to select it.

e to highlight the OK button, then press x or · to save

the selection and open the

Welcome! screen.

4 Getting started with the TI-Nspire™ handheld

4. To continue, click x or press · to select OK and open the Home
screen.

Using the TI-Nspire™ Touchpad

Use the Touchpad to navigate or complete any task that can be
completed using the arrow and Enter keys. Use the touchpad to navigate
in two ways:

• Use it like a computer touchpad by moving your fingertip in a sliding
motion on the center area of the touchpad to activate and move the
mouse pointer. Click or tap the center of the Touchpad to select a
menu option or complete an action.

• Press the arrow keys on the outside edge of the Touchpad to nudge
the mouse pointer up, down, left, or right, then click x or

press · to complete an action.

If you hold down an arrow key, the mouse pointer continues to move
in that direction.

Note: If the mouse pointer is visible on a command or file, click or

x in the center of the touchpad to select that command or file. If

tap
the command or file is highlighted, move the pointer over that item or
press

· to select it.

When working in an application, use the touchpad to access more
information about problems. For example, hovering over a Graphs &
Geometry object displays information about variables used in that object
and about tools that are available.

Some users prefer to customize their touchpad settings; to speed up or
slow down the pointer, or to enable tap to click. To change default
settings for the touchpad see Configuring the TI-Nspire™ handheld.

Getting started with the TI-Nspire™ handheld 5

Using the Home screen

The Home screen opens when you power on your handheld for the first
time. The Home screen provides a starting point for all activities
performed on a handheld:

• Opening the Scratchpad for quick calculations and graphing

• Creating new documents

• Opening and managing existing documents

• Defining settings and viewing status

• Viewing hints for operating the handheld

• Accessing recent documents

• Returning to the current document

Note: To return to the Home screen from any other location, press c.

Selecting options on the Home screen

• By default, the cursor is not active. To activate the cursor, swipe the
touchpad with your fingertip.

• Use the touchpad to click on any of the application icons or any of the
Scratchpad or Documents menu options.

• Press the arrows on the touchpad (
options on the Home screen.

• Move the mouse pointer over each application icon to view a brief
description.

• Press

x or · to select a highlighted option, or press the number

or letter associated with the option.

3, 4, 5,or6) to move among the

Adjusting the contrast

To lighten the display, press and hold / and tap -.

To darken the display, press and hold

6 Getting started with the TI-Nspire™ handheld

/ and tap +.

Home screen options

Menu Option Purpose

Scratchpad

Use the Scratchpad menu options to open a Calculator or Graph
application without affecting your document.

While in Scratchpad, press » to toggle between Scratchpad
applications: Calculate and Graph.

Calculate Opens the Scratchpad with a Calculator application

active. From the Home screen, type

Graph Opens the Scratchpad with a Graph application

active. From the Home screen, type

Documents

To select options for working with documents, press the associated
number or use the Touchpad to select an icon then press

A.

B.

x or ·.

New
Document

My
Documents

Recent Lists the five most recently saved documents.

Current Goes to the document that is currently open.

Settings Check the status of the handheld and change

Application icons

To add a new page to the current document, select an application
icon. If no document is open, a new document opens with the
selected application on a new page.

Calculator

Opens a new TI-Nspire™ document with available
applications listed.

Opens the file browser where you can open existing
TI-Nspire™ documents or send files to others.

settings.

Adds a page to a document for entering and
evaluating math expressions.

Getting started with the TI-Nspire™ handheld 7

Menu Option Purpose

Graphs

Geometry

Lists &
Spreadsheet

Data &
Statistics

Notes

Adds a page for graphing and exploring functions.

Adds a page for creating and exploring geometric
shapes.

Adds a page for working with data in tables.

Adds a page and provides tools used to visualize
sets of data in different types of plots and provides
tools for manipulating data sets to explore
relationships between the sets of data.

Provides text editing functions for adding text to
TI-Nspire™ documents for use as notes or to share
with other users.

Ver nier
DataQuest™

Adds a page for collecting and analyzing data from
sensors or probes.

To learn more about applications and documents, see the Working with

Documents on the TI-Nspire™ handhelds.

8 Getting started with the TI-Nspire™ handheld

Understanding the Scratchpad

Use the Scratchpad to make quick calculations and graphs without
affecting the current TI-Nspire™ document. For example, when you need
a quick way to test a calculation before you add it to a document, you
can open the Scratchpad application and perform the calculation. Then,
you can either discard the calculation or add it to a document. For more
information about the Scratchpad, please see Using the Scratchpad.

The TI-Nspire™ handheld screen

The icons on the handheld screen provide information about the status
of handheld operations and provide an easy way to access and change
settings. This screen shows the icons, which are described below.

Ã

ÁÂ

ÄÅÆÇÀ

À

Icon Function

3 4

À

Á

Â

Ã

Page scrolling arrows - Use the touchpad and these

arrows to scroll through the pages in a document.

Page tabs - Indicate the problem number followed by

the page number. If problems are named, move the
touchpad pointer over the tab to view the page name.

Document name - Shows the current document name.

Click here to access the Documents menu. An asterisk by
the document name indicates changes were made since
the document was last saved.

Press to Test - Indicates that the handheld is in Press-to-

Test mode.

Getting started with the TI-Nspire™ handheld 9

Icon Function

Ä

Å

Login status - Shows whether the handheld is searching

for an access point (blinking), found an access point
(solid), not communicating, connected and ready to log
in (a blinking arrow), or logged in and charged (a solid
arrow). Click here to view Settings & Status.

g, /,orÊ status

Æ

Ç

Settings & status - Shows the level of the battery
supply. Click here to change settings.

Close document - Click here to close the current
document. If information is unsaved, save or discard
when prompted.

Using Hints

Hints are quick tips available throughout the software on the handheld.
There are several easy ways to access Hints:

• Press

• Some dialog boxes contain a question mark icon. Click this icon to

f To scroll through the Hints, use the touchpad or arrow keys:

/ μ.

open Hints for that task.

– To page down, press / 3.

– To page up, press

– To go to the end of the Hints file, press

– To go back to the beginning of the file, press

/ 9.

/ 1.

/ 7.

10 Getting started with the TI-Nspire™ handheld

Using the Scratchpad

The Scratchpad is a feature of the TI-Nspire™ handheld that lets you
quickly:

• Evaluate math expressions.

• Graph functions.

Opening and closing the Scratchpad

f From the Home screen, press » to open the Scratchpad.

The first time you open the Scratchpad, a blank page opens with the
Calculator active.

f Press

» to alternate between the Calculate and Graph pages.

Using the Scratchpad 11

f Press b to see the Scratchpad Calculate or Scratchpad Graph

menu. These menus are subsets of the TI-Nspire™ menus for the
Calculator and Graphs & Geometry applications. For complete listings
of those menus, refer to the documentation for those applications.

f Press

d to close the Scratchpad.

Calculating with the Scratchpad

From the Scratchpad Calculate page, enter a math expression on the
entry line, then press

in standard mathematical notation as you enter them.

Each evaluated expression and result becomes part of the Scratchpad
history, displayed above the entry line.

· to evaluate the expression. Expressions display

Entering simple math expressions

Note: To enter a negative number, press v and then enter the number.

Suppose you want to evaluate

1. Select the entry line in the work area.

2. Type

3. Press

2 l 8 to begin the expression.

¢ to return the cursor to the baseline, and then complete the

expression by typing:

r 43 p 12

4. Press · to evaluate the expression.

The expression displays in standard mathematical notation, and the
result displays on the right side of the page.

Note: You can force a decimal approximation in a result by pressing

/

· instead of ·.

12 Using the Scratchpad

Pressing
result.

Note: Results formatting can also be adjusted in Settings. See Working
with documents on the TI-Nspire™ handheld for more information about
Settings.

/

· forces the approximate

Inserting items from the Catalog

You can use the Catalog to insert functions and commands, units,
symbols, and expression templates into the entry line.

1. Press

k to open the Catalog. By default, the first tab is displayed,

which lists all commands and functions in alphabetical order.

Catalog
for a non­CAS
handheld

Catalog for
a CAS
handheld

Using the Scratchpad 13

2. If the function you are inserting is visible in the list, select it and press

· to insert it.

3. If the function is not visible:

a) Press a letter key to jump to the entries that begin with that letter.

b) Press

c) Click a numbered tab to list functions by category: math functions,

d) Press

¤ or £ as necessary to highlight the item you are inserting.

symbols, math templates, library objects, and value for standard
measurement units (CAS).

· to insert the item into the entry line.

Using an expression template

Templates help you enter matrices, piecewise functions, systems of
equations, integrals, derivatives, products, and other math expressions.

For example, suppose you want to evaluate

1. Press t to open the Template palette.

2. Select to insert the algebraic sum template.

The template appears on the entry line with small blocks representing
elements that you can enter. A cursor appears next to one of the
elements to show that you can type a value for that element.

3. Use the arrow keys to move the cursor to each element’s position, and
type a value or expression for each element.

4. Press

14 Using the Scratchpad

· to evaluate the expression.

Inserting expressions using a wizard

You can use a wizard to simplify entering some expressions. The wizard
contains labeled boxes to help you enter the arguments in the
expression.

For example, suppose you want to fit a y=mx+b linear regression model
to the following two lists:

{1,2,3,4,5}
{5,8,11,14,17}

1. Press

2. Click inside the list, and then press

3. Press

4. If the

k1 to open the Catalog and show the alphabetic list of

functions.

L to jump to the entries that

begin with “L.”

¤ as necessary to highlight LinRegMx.

Wizards On option is not checked: Press ee to highlight

Wizards On, press · to change the setting, then press ee to

highlight

LinRegMx again.

LinRegMx
function in a
non-CAS
handheld

Using the Scratchpad 15

LinRegMx
function in a
CAS
handheld

5. Press ·.

A wizard opens, giving you a labeled box to type each argument.

6. Type {

1,2,3,4,5} as X List.

7. Press e to move to the Y List box.

8. Type

{5,8,11,14,17} as Y List.

9. If you want to store the regression equation in a specific variable,
press e, and then replace Save RegEqn To with the name of the
variable.

10. Select

OK to close the wizard and insert the expression into the entry

line.

The expression is inserted along with statements to copy the
regression equation and display the variable stat.results, which will
contain the results.

16 Using the Scratchpad

LinRegMx {1,2,3,4,5},{5,8,11,14,17},1: CopyVar stat.RegEqn,f1:
stat.results

The Scratchpad then displays the stat.results variables.

Note: You can copy values from the stat.results variables and paste
them into the entry line.

Viewing the history

Each evaluated expression and result becomes part of the Scratchpad
history, displayed above the entry line.

f Press

£ or ¤ to scroll through the history.

À Current entry/total entries

À

Using the Scratchpad 17

Copying a history item to the entry line

You can quickly copy an expression, subexpression, or result from the
history into the entry line.

1. Press

2. Optionally, select part of the expression or result by using

3. Press

£ or ¤ to move through the history and select the item that

you want to copy.

Shift in

combination with the arrow keys.

· to copy the selection and insert it into the entry line.

Clearing the history

When you clear the history, all variables and functions defined in the
history retain their current values. If you clear the history by mistake, use
the undo feature.

f From the

(Press

All expressions and results are removed from the history.

Actions menu, select Clear History.

b 1 5.)

Editing Scratchpad expressions

Although you cannot edit a Scratchpad Calculate expression in the
history, you can copy all or part of an expression from the history and
paste it to the entry line. You can then edit the entry line.

Inserting elements into the entry line

1. Press e, ¡, ¢, £, or ¤ to position the cursor in the expression. The
cursor moves to the closest valid position in the direction that you

press.

2. Type the elements or insert them from the Catalog.

Selecting part of an expression

You can delete, cut, or copy a selected part of an expression.

1. Press

2. Press and hold

18 Using the Scratchpad

¡, ¢, £, or ¤ to move the cursor to a starting point in the

expression.

g and press ¡, ¢, £, or ¤ to select.

– To delete the selection, press ..

– To cut the selection to the Clipboard, press

– To copy the selection to the Clipboard, press

– To paste the selection to a new entry line in Scratchpad, press

/X.

/C.

/V.

Graphing with the Scratchpad

From the Scratchpad Graph page, click the Entry Line Expand button
to display the entry line and type an expression to graph. The entry line
displays the required format for typing a function. The default graph
type is Function, so the form f1(x)= displays.

1. Choose

For example,

• To graph a scatter plot, press b34. Click var to choose

• To graph a function, press

The entry line changes to display the expression format for the
specified graph type. You can specify multiple functions of each
graph type.

2. Type an expression and any other parameters required for the graph
type.

Graph Type from the menu, and select a graph type.

variable to plot as x and y for sn.

b31.

3. Press

· to graph the function, or press ¤ to add another function.

If necessary, you can use press

Window/Zoom

When you graph the expression, the entry line disappears to show an
uncluttered view of the graph. If you select or trace a function, that
function displays on the entry line. You can change a function by
editing its expression or grabbing and changing the graph.

As you graph multiple functions on the axes, the label containing the
expression displays for each. You can define and graph a maximum of
99 functions of each type.

menu and adjust the viewing area.

b4 to choose a tool on the

Using the Scratchpad 19

4. Use the b key to explore and analyze the graphed function by

tracing it, finding points of interest, or assigning a variable in the
expression to a slider.

Viewing the function table

f To display a table of values for the current function, press

b25.

f To hide the function table, click the graph and then press

b25.

Changing the appearance of the axes

As you work with graphs, the Cartesian axes are displayed by default.
You can change the appearance of the axes in the following ways:

1. Press

2. Select the axes and press

3. Adjust the axes scale and tic mark spacing manually.

20 Using the Scratchpad

b4 and choose the Zoom tool to use.

/b3 to activate the Attributes

tool.

a) Press 9 or : to move to the attribute to change. For example,

choose the end style attribute.

b) Press 7 or 8 to choose the style to apply.

c) Change any other attributes of the axes as required for your work,

then press

a) Click and hold one tick mark, and move it on the axis. The spacing

and number of tic marks increases (or decreases) on both axes.

b) To adjust the scale and tic mark spacing on a single axis, press and

hold

d to exit the attributes tool.

g, and then grab and drag a tic mark on that axis.

4. Change axis end values by double-clicking them and typing new
values.

5. Adjust the location of the axes. To move the existing axes without
resizing or rescaling them, click in and drag an empty region of the
screen until the axes are in the desired location.

6. Change the axes’ scales by pressing

Type the values of your choice over the current values for x-min,
x-max, y-min, and y-max and click

7. Press b21 to hide or show the axes.

• If the axes are shown on the page, selecting this tool hides them.

• If the axes are hidden on the page, selecting this tool redisplays

them.

b41.

OK.

Tracing a graphed function

Graph Trace moves through the points of a graphed function,
parametric, polar, sequence, or scatter plot. To enable the trace tool:

1. Press

b51 to move across the points in a graphed function

in Trace model.

2. (Optional) To change the step increment for tracing, press

b53.

After you type a different step increment, the Graph Trace tool moves
across the graph in steps of that size, instead of moving at the default
step automatically defined with a function.

3. Use Graph Trace to explore a graphed function in the following ways:

• Move to a point and hover to move the trace cursor to that point.

Using the Scratchpad 21

• Press 7 or 8 to move from point to point on the function’s graph.

The coordinates of each point traced displays.

• Press 9 or : to move from one function’s graph to another, or to a
scatter plot. The point’s coordinates update to reflect the new
location of the trace. The trace cursor is positioned on the point of
the new graph or plot with the closest x value to the last point
identified on the previously traced function or graph.

• Type a number and press · to move the trace cursor to that
value on the function’s graph.

• Create a persistent point that remains on the graph while in
Graph

Trace mode by pressing · when the trace point reaches

the point you want to label.

• Trace through and identify the points at which the function has
no defined x or y value (a discontinuity). The string undef displays
instead of a value when you move over a point that is not defined
for the function.

Notes:

• When you select or trace a function on the work area, that
function displays on the Edit Line.

• When you trace beyond the initially visible graph, the screen pans
to show the area being traced.

4. Exit Graph Trace by pressing d or by choosing another tool.

Finding points of interest

You can use the tools on the Analyze Graph menu to find a point of
interest in a specified range of any graphed function. Choose a tool to
find zero, the minimum or maximum, the point of intersection or
inflection, or the numeric derivative (dy/dx) or Integral on the graph.

1. Select the point of interest that you want to find on the

Graph

menu. For example, to find a zero, press b61.

The icon for the selected tool displays at the top left on the work
area. Point to the icon to view a tooltip about how to use the selected
tool.

2. Click the graph you want to search for the point of interest, then click
a second time to indicate where to start the search for the point.

22 Using the Scratchpad

Analyze

The second click marks the lower bound of the search region and a
dotted line displays.

Note: If you are finding the derivative (dy/dx), click the graph at the
point (numeric value) to use for finding the derivative.

3. Press 3 or 4 to move the dotted line that marks the search region, then
click the point at which you want to stop the search (upper bound of
the search region).

4. Press

· at the point to start the search. The tool shades the range.

If the search region you specified includes the point of interest, a
label for the point displays. If you change a graph that has points of
interest identified, be sure to check for changes in points of interest.
For example, if you edit the function on the entry line or manipulate
a plot, the point where the graph intersects zero can change.

The labeled points of interest remain visible on the graph. You can
exit the tool by pressing

d or choosing another tool.

Working with variables in the Scratchpad

Scratchpad variables are shared between Scratchpad Calculate and
Scratchpad Graph, but not with any TI-Nspire™ documents. If you use the
same name for a Scratchpad variable and a variable in a document, no
conflict occurs unless you attempt to copy expressions between
documents and the Scratchpad.

Saving the Scratchpad contents

You can save the Scratchpad Calculate page, the Scratchpad Graph page,
or both as a TI-Nspire™ document.

1. Press

~, then select Save to Document.

Using the Scratchpad 23

2. Press ·.

The Save to Document dialog box opens.

3. Select the page or pages to save.

4. If a document is open, select either New or Current document.

5. Click Save.

• If you selected to save to an open document, the Scratchpad
pages are added to the document.

• If you selected to save to a new document:

– Click

– Type a name for the document.

– Click Save to save the new document.

Yes when the Save dialog box opens.

Clearing Scratchpad contents

Complete the following steps to delete the calculations and graphing
work from the Scratchpad application.

1. Press

2. Press

24 Using the Scratchpad

~, then select Clear Scratchpad.

· to delete the Scratchpad contents.