Texas Instruments TI-Nspire Series, TI-Nspire CX CAS, TI-Nspire CX Getting Started
Getting Started with the
TI-Nspire™ CX/
TI-Nspire™ CX CAS
Handheld
This guidebook applies to TI-Nspire™ software version 3.2. To obtain the
latest version of the documentation, go to education.ti.com/guides.
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Vernier DataQuest™ is a trademark of its respective owner.
© 2010 - 2012 Texas Instruments Incorporated
ii
Contents
Important Information................................................................... ii
Getting Started with the TI-Nspire™ CX Handheld...............1
About CAS....................................................................................... 1
TI-Nspire™ CX Handheld Keys....................................................... 2
Preparing the TI-Nspire™ CX Handheld for Use .......................... 3
Turning On the TI-Nspire™ Handheld for the First Time............. 3
Adjusting the Brightness of the Backlighting .............................. 5
Using the TI-Nspire™ Touchpad .................................................... 5
Understanding the Scratchpad...................................................... 6
Using the Home Screen.................................................................. 6
The TI-Nspire™ Handheld Screen.................................................. 8
Using Hints.................................................................................... 10
Using the Scratchpad............................................................11
Opening and Closing the Scratchpad.......................................... 11
Calculating with Scratchpad........................................................ 12
Inserting Items from the Catalog ................................................ 13
Viewing the History...................................................................... 17
Editing Scratchpad Expressions ................................................... 19
Graphing with the Scratchpad .................................................... 19
Working with Variables in the Scratchpad ................................. 25
Saving the Scratchpad Contents.................................................. 25
Clearing Scratchpad Contents ..................................................... 26
Working with Documents on TI-Nspire™ Handhelds..........27
Opening a Document................................................................... 27
Creating a New Document .......................................................... 28
Saving Documents ........................................................................ 29
Working with Applications .......................................................... 30
Using the Application Menu........................................................ 35
Context Menus ............................................................................. 36
Working with Problems and Pages ............................................. 37
Adding a Problem to a Document .............................................. 37
Viewing and Reordering Pages in a Document.......................... 38
Copying, Pasting, and Deleting Problems................................... 41
Renaming a Problem.................................................................... 42
Adding a Page to a Problem........................................................ 42
Moving Through Pages in a Document ...................................... 43
Managing Documents.................................................................. 43
iii
Closing a Document......................................................................47
Understanding the TI-Nspire™ Tools...........................................47
Working with Images........................................................... 53
Working with Images on a Handheld ......................................... 53
Working in a TI-Nspire™ Navigator™ Teacher Software
Classroom ....................................................................... 57
Pausing a Class Session .................................................................57
Logging In to Class........................................................................ 57
Connecting to the TI-Nspire™ Navigator™ System....................58
Understanding File Transfers .......................................................60
Configuring Handhelds ........................................................ 63
Checking Battery Status ...............................................................63
Recharging the Handheld ............................................................63
Changing Handheld Settings .......................................................64
Changing a Preferred Language..................................................65
Customising the Handheld Setup ................................................66
Customising Document Settings.................................................. 67
Customising Graphs & Geometry Settings ..................................71
Viewing Handheld Status.............................................................73
Replacing TI-Nspire™ Rechargeable Batteries............................74
Using Wireless Communication Hardware..................................75
Connecting Handhelds and Transferring Files .................... 79
Connecting Handhelds ................................................................. 79
Transferring Files to and from Handhelds...................................81
Transferring Files Between Computers and Handhelds .............82
Handling Errors Resulting from Sending Folders........................84
Memory and File Management ........................................... 87
Checking Available Memory ........................................................87
Freeing Memory............................................................................ 88
Resetting the Memory.................................................................. 90
Updating the Handheld Operating System......................... 93
What You Need to Know ............................................................. 93
Finding Operating System Updates............................................. 94
Updating the Operating System.................................................. 95
Updating the OS on Multiple Handhelds.................................... 99
OS Upgrade Messages ................................................................100
iv
Using Keyboard Shortcuts..................................................103
Keyboard Shortcuts.................................................................... 103
Appendix: Service and Support .........................................107
Precautions for Rechargeable Batteries.................................... 107
Texas Instruments Support and Service..................................... 108
Service and Warranty Information............................................ 108
Index ....................................................................................109
v
vi
Getting Started with the TI-Nspire™ CX Handheld
The TI-Nspire™ CX handheld and the TI-Nspire™ CX CAS handheld are
the newest handhelds in the TI-Nspire™ family of products. Featuring a
backlit color display and a slimmer form, the handhelds provide
touchpad navigation, dynamic graphing, and interactive computer
features.
The handhelds 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, and 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™ CX handheld and the TI-Nspire™
CX CAS handheld. While they operate identically in many ways, there are
a few distinctions. If the TI-Nspire™ CX 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™ CX Handheld 1
TI-Nspire™ CX Handheld Keys
d Removes menus
or dialog boxes from
the screen. Also stops
a calculation in
progress.
» Opens the
Scratchpad for
performing quick
calculations and
graphing.
e Moves to the
next entry field.
g Makes the next
character typed
upper-case.
/ Provides access
to the function or
character shown
above each key. Also
enables shortcuts in
combination with
other keys.
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
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.
Note: A
press º repeatedly or use the arrow keys on the Touchpad. Press · or click to
select the option.
2 Getting Started with the TI-Nspire™ CX Handheld
¢ symbol on a key indicates access to multiple options. To access an option,
Preparing the TI-Nspire™ CX Handheld for Use
The TI-Nspire™ CX handheld comes equipped with an Li-ion
rechargeable battery. Like a cell phone or other similar device, charge the
battery for at least four hours to ensure optimum performance. The
handheld also comes with the following accessories:
• Standard mini-B to mini-B USB cable for transferring files to another
handheld
• Standard A to mini-B USB cable for transferring files to and from a
computer and for charging the battery
Charging the Handheld
Use one of the following options to charge the battery in the TI-Nspire™
CX handheld:
• Connect the handheld to a computer using a standard A to mini-B
USB cable. If the driver is not found when the handheld is connected
to the computer, insert the CD to install the correct driver. To
download software that includes a driver, go to
education.ti.com/software.
• Connect to a wall outlet using a TI wall adapter (sold separately in
Europe and Asia).
• Place the handheld or multiple handhelds in a TI-Nspire™ CX Docking
Station or TI-Nspire™ Docking Station.
Note: For more information about recharging batteries, see Configuring
Handhelds.
Turning On the TI-Nspire™ Handheld for the First Time
After charging the battery, press c to turn on the handheld.
A progress bar is displayed while the operating system loads. Next,
choose preferences for language and font size when prompted.
Note: To turn the handheld off, press /c. The settings and
memory contents are retained.
Getting Started with the TI-Nspire™ CX Handheld 3
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 last 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
Power Standby setting.
Note: For more information about setting up the handheld, see
Configuring Handhelds.
Choosing a Language
After the OS is loaded, select a preferred language.
1. Press ¢ to open the drop-down list.
2. Press 6 to scroll through the languages, and then press
to select a language.
3. Press
e to highlight the OK button, and then press x or · to
save the language selection.
Choosing a Font Size
Next, select a font size for the display.
1. Press
4 Getting Started with the TI-Nspire™ CX Handheld
¢ to open the drop-down list.
x or ·
2. Press 6 to highlight the font size, and then press x or · to select
it.
3. Press
4. To continue, press
e to highlight the OK button, and then press x or ·.
Welcome! screen opens.
The
Home screen opens.
The
x or · to select OK.
Adjusting the Brightness of the Backlighting
The screen on the TI-Nspire™ CX handheld is backlit making it easier to
use in all lighting conditions. By default, the brightness setting is
medium. To adjust the backlight brightness:
•
Dimmer: Press and hold / and tap -.
•
Brighter: Press / and tap +.
Using the TI-Nspire™ Touchpad
Use the Touchpad to navigate or complete any task that can be
completed using the arrow and
in two ways:
Getting Started with the TI-Nspire™ CX Handheld 5
Enter keys. Use the Touchpad to navigate
• 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, and then click
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
· to select it.
press
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 their pointer, or to enable tap to click. To change the default
settings for the Touchpad, see Configuring Handhelds.
exor
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, see Using the Scratchpad.
Using the Home Screen
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
• Opening the scratchpad for quick calculations and graphing
• Defining settings and viewing status
• Viewing hints for operating the handheld
6 Getting Started with the TI-Nspire™ CX Handheld
• Accessing recent documents
• Returning to the current document
Note: To return to the Home screen from any other location, press
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
Graph
Documents
To select options for working with documents, press the associated
number or use the Touchpad to select an icon then press
New
Document
My
Documents
Opens the Scratchpad with a Calculator application
active. From the Home screen, type
Opens the Scratchpad with a Graph application
active. From the Home screen, type
A.
B.
x or ·.
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.
c.
Recent
Current
Settings
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.
Lists the five most recently saved documents.
Goes to the document that is currently open.
Check the status of the handheld and change
settings.
Getting Started with the TI-Nspire™ CX Handheld 7
Menu Option Purpose
Calculator
Graphs
Geometry
Lists &
Spreadsheet
Data &
Statistics
Adds a page to a document for entering and
evaluating math expressions.
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.
Notes
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™ CX Handheld
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.
Icon Function
3 4 Page scrolling arrows - Use the touchpad and these
À
Á
Â
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.
Ã
Ä
Å
Press to Test - Indicates that the handheld is in Press-to-
Test mode.
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, /,or Ê status.
Getting Started with the TI-Nspire™ CX Handheld 9
Icon Function
Æ
Ç
Settings & Status:
• Hover the cursor over the icon to show the angle
mode setting in effect for the active application and
the level of the battery supply.
• Click the icon to open the Settings menu.
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
To scroll through the Hints, use the Touchpad or arrow keys:
/ μ.
open Hints for that task.
– To page down, press
– To page up, press
– To go to the end of the Hints file, press
– To go back to the beginning of the file, press
/ 3.
/ 9.
/ 1.
/ 7.
10 Getting Started with the TI-Nspire™ CX Handheld
Using the Scratchpad
The Scratchpad is a feature of the TI-Nspire™ CX handheld that lets you
quickly:
• Evaluate math expressions.
• Graph functions.
Opening and Closing the Scratchpad
From the Home screen, press » to open the Scratchpad.
The first time you open the Scratchpad, a blank page opens with the
Calculator active.
Press
» to alternate between the Calculate and Graph pages.
Using the Scratchpad 11
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 applications. For complete listings of those menus, see
the documentation for those applications.
Press
d to close the Scratchpad.
Calculating with Scratchpad
From the Scratchpad Calculate page, enter a math expression on the
entry line, and then press
are displayed 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
Entering Simple Math Expressions
Note: To enter a negative number, press v and then type 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 is displayed in standard mathematical notation, and
the result is displayed on the right side of the page.
12 Using the Scratchpad
Note: You can force a decimal approximation in a result by pressing
/
· instead of ·.
Pressing /· forces the approximate result.
Note: Results formatting can also be adjusted in settings. For more
information about customizing settings, see Configuring Handhelds.
Inserting Items from the Catalog
You can use the Catalog to insert functions and commands, 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
non-CAS
handheld
Using the Scratchpad 13
Catalog for a
CAS handheld
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
2. Select to insert the algebraic sum template.
t to open the Template palette.
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.
14 Using the Scratchpad
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
· 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.
5. Press · to change the setting.
Using the Scratchpad 15
6. Press ee to highlight LinRegMx again.
LinRegMx
function in a
non-CAS
handheld
LinRegMx
function in a
CAS handheld
7. Press
·.
A wizard opens, giving you a labeled box to type each argument.
16 Using the Scratchpad
8. Type {1,2,3,4,5} as X List.
9. Press e to move to the Y List field.
10. Type
11. If you want to store the regression equation in a specific variable,
12. Click
{5,8,11,14,17} as Y List.
press
e, and then replace Save RegEqn To with the name of the
function variable (f1 through f99).
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.
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.
Press
£ or ¤ to scroll through the history.
Using the Scratchpad 17
Current entry/total entries
À
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.
g 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.
From the
—or—
18 Using the Scratchpad
Actions menu, click Clear History.
Press b 15.
All expressions and results are removed from the history.
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
¡, ¢, £, 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
1. Press » to open the Scratchpad Graph page if it is not already
open.
By default, the entry line is displayed. The entry line displays the
required format for typing a relation. The default graph type is
Function, so the form f1(x)= is displayed.
If the entry line is not shown, press
display the entry line and type an expression to graph.
2. Press
b > Graph Entry/Edit and select a graph type.
For example:
Ctrl + G or press b23 to
Using the Scratchpad 19
• To graph an equation for a circle, press b > Graph Entry/Edit >
2
Equation > Circle > (x-h)
Fill in the equation and press
+ (y-k)2 = r
· to draw the circle.
2
or press b3231.
• To graph a function, press
press
b31.
The entry line changes to display the expression format for the
specified graph type. You can specify multiple relations of each graph
type.
3. Type an expression and any other parameters required for the graph
type.
4. Press
5. Use the
· to graph the relation, or press ¤ to add another relation.
If necessary, you can use press
Window/Zoom
When you graph the relation, the entry line disappears to show an
uncluttered view of the graph. If you select or trace a plot, the
relation that defines the plot is displayed on the entry line. You can
modify a plot by defining a relation or by selecting and changing the
graph.
As you graph multiple plots, the defining relation is displayed for
each. You can define and graph a maximum of 99 relations of each
type.
menu and adjust the viewing area.
b key to explore and analyze the relation to:
b > Graph Entry/Edit > Function or
b4 to choose a tool on the
• Trace the relation.
• Find points of interest.
• Assign a variable in the expression to a slider.
Viewing the Table
To display a table of values corresponding to the current plots, press
b > Table > Split-screen Table (b71).
20 Using the Scratchpad
To hide the table, click the graph side of the split screen, and then
b > Table > Remove Table (b72). You can also press
press
Ctrl + T.
To resize columns, click the table and press
(
b11).
To delete a column, edit an expression, or edit table settings, click the
table and press
b > Table (b2).
b > Actions > Resize
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.
b4 and choose the Zoom tool to use.
/b2 to activate the Attributes tool.
a) Press
b) Press
c) Change any other attributes of the axes as required for your work,
a) Click and hold one tick mark, and move it on the axis. The spacing
b) To adjust the scale and tic mark spacing on a single axis, press and
£ or ¤ to move to the attribute to change. For example,
choose the end style attribute.
¡ or ¢ to choose the style to apply.
and then press
and number of tic marks increases (or decreases) on both axes.
g, and then grab and drag a tic mark on that axis.
hold
· to exit the attributes tool.
Using the Scratchpad 21
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
Settings
Type the values of your choice over the current values for x-min,
x-max, y-min, y-max, Xscale, and Yscale and click
7. Press b > View > Hide Axes (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
(b41).
them.
b > Window/Zoom > Window
OK.
Tracing a Plot
Graph Trace moves through the points of a graphed function,
parametric, polar, sequence, or scatter plot. To enable the trace tool:
1. Press
b > Trace > Graph Trace (b51) to move across the
plot in Trace mode.
2. (Optional) To change the trace 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.
3. Use Graph Trace to explore a plot in the following ways:
• Move to a point and hover to move the trace cursor to that point.
22 Using the Scratchpad
• Press ¡ or ¢ to move from point to point on the function’s graph.
The coordinates of each point traced are displayed.
• Press
• Type a number and press · to move the trace cursor to the
• Create a persistent point that remains on the graph by pressing
£ or ¤ to move from one plot to another. 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.
point on the plot with independent coordinates nearest the typed
value.
· when the trace point reaches the point you want to label.
The point remains after you exit Graph Trace mode.
Notes:
• The string undef is displayed instead of a value when you move
over a point that is not defined for the function (a discontinuity).
• When you trace beyond the initially visible graph, the screen pans
to show the area being traced.
4. Press
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.
d or choose another tool to exit Graph Trace.
1. Select the point of interest that you want to find on the
menu. For example, to find a zero, press b61.
Graph
non-CAS CAS
Zero
Minimum
Maximum
Intersection
Inflection Not applicable
dy/dx
b61 b61
b62 b62
b63 b63
b64 b64
b65
b65 b66
Using the Scratchpad 23
Analyze
Integral
non-CAS CAS
b66 b67
Analyze Conics
The icon for the selected tool is displayed 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, and then
click a second time to indicate where to start the search for the point.
The second click marks the lower bound of the search region and a
dotted line is displayed.
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
¡ or ¢ to move the dotted line that marks the search region, and
then click the point at which you want to stop the search (upper
bound of the search region).
b67 b68
4. Press
24 Using the Scratchpad
· 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 is displayed. 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.
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