SHARP EL-9400 service manual

Graphing Calculator

EL-9400

TEACHERS’ GUIDE

Built-in slide shows

Educational tools

(OHP/PC-link/Data collection)

Shift/Change function

Equation editor

Split display

Large display

Rapid graph

Rapid window

Rapid zoom

Easy to Teach

Easy to Learn

Easy to Use

I

ntroduction

Contents

Sales points P 1
Basic operation P 2
Equation editor P 4
Features

Shift P 5
Change P 6
Slide show P 7
Slide show selections P 8
Graphing procedure P 10
Rapid graph P 11
Rapid window P 12
Rapid zoom P 13

System options

PC-link system P 14
Set to set communication P 15
OHP system P 16

Menu tree 1~6 P 17
Specifications P 23

The EL-9400 was developed to meet the needs of an expanding
education market and is based on three concepts: easy to teach,
easy to learn and easy to use. The EL-9400 has been designed
with simplified operations and time-saving features, allowing
teachers to concentrate on actual teaching.

This manual was designed to introduce teachers to the unique
features of the EL-9400 using detailed operation examples.

Sales points

Graph Shift/Change shows
how "changing" the graph
affects the equation

Large 96 x 64-dot
display

Slide Shows reduce class

preparation time

Rapid zoom allows easy
adjustment of window size

Rapid graph/Rapid window

simplify graphing procedures

1

3

Equation Editor shows
equations just as in textbooks

2

4

5

6

EL-9400 Graphing Calculator

1

EL-9400 Graphing Calculator

Y =

EZ

CL

QUIT

CL

Basic operation

Power ON/OFF

○○○○○○○

○○○○○○

Power on

○○○

Power off

Erase equations and
remove error displays

○○○

Cancel of previous
function (Escape)

Names of parts

Function keys

Use to enter equations

Use to draw graphs

Use to view table of function value

Use to set size of viewing window

Use to adjust the viewing range

Use to trace graphs

Use to enter calculation mode

Use to enter slide show mode

Use to operate Rapid Graph/Rapid
Window and Rapid Zoom functions

1

Graphing keys

2

Power supply ON/OFF key

3

Alphabet specification key

4

Secondary function
specification key

5

Display screen

Cursor movement keys

6

Clear/Quit key

7

8

Variable enter key

9

Calculation execute key

Communication port for peripheral devices

10

2

EL-9400 Graphing Calculator

SET UP

Basic operation

Guide to key use

Press to use secondary functions (in yellow).

Press to use the alphabet keys (in blue).

Example:

To select “sin”:

To select “sin-1”:

To select A:

Adjusting screen contrast

• The contrast adjust screen will appear
when pressing

SET UP menu

• Contents displayed on the right side of

Reset function

1) When trouble occurs

Press to enter the reset mode.

Press

the screen are the current settings.

]

There may be differences in the results
of calculations and graph plotting
depending on the SET UP settings.

.

]

.

Press to lighten contrast.

Press to darken contrast.

• Use this function (1 or 2 ) to return all
settings to the default value or to delete all

data.

2) All RESET operation

• If trouble still occurs, proceed as follows:

1. Press the RESET switch on the back.

2. Press .

• Returns to the initial display.

CAUTION

Do not press CL in step 2. It will delete all data
stored in the calculator.

3

EL-9400 Graphing Calculator

CL

0

1

a/b2a/b

1

x

2

X/T

X/T

Equation editor

The equation editor allows equations to be viewed just as they are written in textbooks. This
increases student comprehension and allows mistakes to be found quickly.

Example

Input the equation and see how it can be easily
viewed with the equation editor.

1

2

3

4

(or 6 )

Display

NotesKey Operation

Clear the display.

Select CALC and

(Integral function)

Enter the range of the integral.

Enter

Complete equation input.

5

(or

6

4

0 7 )

Calculate the expression.

]

The blinking mark in the upper right
side of the display indicates the
expression is being calculated.

]

SHIFT/CHANGE

Features

EL-9400 Graphing Calculator

Shift

Graph shift function helps students grasp the relationship between an equation and its graph.
Shift the graph’s location without changing its shape, and the change is immediately reflected
in the equation on the right side of the display.

Example

When the graph of y = x2 is shifted downward,

1

2

(Change the location of graphs)

how does this affect the equation?

Display

Enter

SHIFT/CHANGE

]

If

SHIFT

highlighted press .

Select shift. Cursor moves to the
equation menu.

NotesKey Operation

mode.

is not already

]

3

4

5

]

2

and

Select the equation: y = x
draw the graph.

Select the location of the shift:
move cursor down twice.

View the result of the shift.

]

2

y = x

y = x2-2

5

SHIFT/CHANGE

Features

EL-9400 Graphing Calculator

Change

Graph change function helps students grasp the relationship between an equation and its
graph. Change the shape of the graph, and the change is immediately reflected in the equation
on the right side of the display.

Example

(Change the shape of the graphs)

When the graph of y = x2 is changed,

how does it affect the equation?

1

2

Display

Enter
and specified (

Select change. Cursor will move
to the equation menu.

NotesKey Operation

SHIFT/CHANGE

CHANGE

mode

).

3

4

5

]

2

and

Select the equation: y = x
draw the graph.

Select the location of the
change: increase the value of y­coordinates.

View the result of the change.

y = x

y = 2x

2

2

]

6

Features

EL-9400 Graphing Calculator

Slide show

Slide show assists with teacher preparation. By selecting from the built-in options or cre­ating your own series of slides, you can demonstrate lessons with minimum preparation
time.

Example

Use the built-in slide show of y = x2 to show how the

coordinates change as you move along the graph.

1

2

3

4

Display

NotesKey Operation

Specified

Select the built-in menu.

Select y = x2 and the first slide
appears.

Begin the slide show by press­ing the cursor key.

SLIDE SHOW

mode.

Moving between the values you
can follow the changes in the
graph’s coordinates, making the
nature of the graph easier to
understand.

* View the selection of built-in slide shows

on the following pages.

7

Features

EL-9400 Graphing Calculator

Built-in slide show selections

1) Y=X

2

2) Y=AX+B

3) Y= X

4) Y=1/X

8

Features

EL-9400 Graphing Calculator

Built-in slide show selections

5) Y=sinX 6) Y=tanX 7) Y=cos-1X 8) Y=lnX

9

Y =

EZ

EZ

EZ

Features

3

a

b

x

2

2

1

5

(–)

331

(–)

515

X/T

X/T

X/T

EL-9400 Graphing Calculator

Graphing Procedures

The EL-9400 has three unique functions that simplify graphing procedures: Rapid Graph,
Rapid Window and Rapid Zoom. Of course, the EL-9400 supports conventional graphing
procedures as well.

Graphing Procedure

Following outlines graphing procedures and indicates the steps where Sharp's unique functions can
be used to simplify operations. These functions are introduced on the following pages.

Step 1

Input equation

Step 2

Set X, Y range

Xmin =
Xmax =
Xscl =
Ymin =
Ymax =
Yscl =

Manual Input

Manual Input

Rapid Graph

Simply select from
built-in menu to
modify desired type of equation .

Rapid Window

Simply select from
built-in menu to set
window size.

Step 3

Draw graph

Press Graph button to draw graph.

Manual Input

Rapid Zoom

Step 4

Adjust viewing
window

10

Amending
range size

Go back to Step 2 to
readjust window size.

Use arrows to adjust window
size while viewing graph.

Y =

EZ

Features

EL-9400 Graphing Calculator

Rapid graph

Graphing has never been easier. With its full range of preset equations, rapid graph
simplifies equation input. Use in conjunction with the rapid window function or with any
graph created.

Example

Draw the graph for y = 2sin (-2x+ ) + 2

using the rapid graph function.

1

2

3

4

Display

NotesKey Operation

Enter the equation entry mode.

Enter Rapid Graph mode and view
the equation-type menu.

Select the type of equation: Trigo­nometric, and view the equation
format menu.

Select the sin equation format and
view the sin equation style.

5

6

Select the second equation style and
input. If necessary, make changes to
the coefficients.

Draw the graph.

(Note: Previous range values may affect
the viewing window. To reset range
values, use Rapid Window.)

11

EZ

Features

5

5

EL-9400 Graphing Calculator

Rapid window

Rapid window simplifies setting window size with a range of preset values. Use in con­junction with the rapid graph function or with any graph created.

Example

After using Rapid Graph to draw the graph of y = 2sin (-2x+ ) + 2 (refer

p. 11), set the viewing window using the rapid window function.

1

2

3

4

(Five times)

(or

Display

Enter viewing window setup mode.

Enter Rapid Window mode.

Select the No. 3 style and view the
X-range menu.

Select X-range No. 4:
(-1 < X < 10 scl=1), and
view the Y-range menu.

)

NotesKey Operation

12

5

7

(Six times)

(or

)

Move the cursor to No. 5:
(-0.5 < Y < 5 scl=0.5)

Select the Y-range and draw the
graph.

EZ

Features

Y =

1

5

(–)

331

(–)

515

3

a

b

x

2

2

X/T

X/T

X/T

EL-9400 Graphing Calculator

Rapid zoom

Rapid zoom offers one-touch adjustment of window size while viewing the graph.
guessing or wasting class time to find optimal values for window size.

Example

Adjust the viewing window for y = x3 + x2 - 2x

to show the entire graph.

1

Display

Create the graph y = x3 + x2 - 2x
using the following conditions:
X-range: xmin = -3

Y-range: ymin = -1.5

NotesKey Operation

xmax = 3
xscl = 1

ymax = 1.5
yscl = 0.5

No more

2

3

4

5

Enter Rapid Zoom mode.

Change X-range from Ymax = 1.5 to
Ymax=2. Draw the graph.

Repeat: Change Y-range from Ymax
= 2 to Ymax=2.5. Draw the graph

View display (adjusted).

13

System options

PC-Link
Software

PC-Link
Software

PC conversion
connector for
IBM-PC

PC conversion
connector for
Macintosh

CE-450L

IBM PC

or Compatibles

R

R

Macintosh

EL-9400 Graphing Calculator

PC-LINK

Connect the EL-9400 with a PC or Macintosh computer to expand the possibilities of data
exchange using PC-Link software.

CE-LK1(PC-link system)

14

What is PC LINK?

• Creates and edits EL-9400 programs on a PC.

• Receives and saves programs and various data from EL-9400.

• Makes a backup of all the contents of EL-9400.

• Sends programs and various data to EL-9400.

Procedure

• Loads image data of EL-9400.

• Converts programs and various data files into a Text File. Converts

• Prints out programs and various data files.

Turn off the EL-9400.

1

Connect the EL-9400 to the PC by using the

2

CE-450L, PC-Link adaptor and PC connector
(see above diagram).

Make sure that the RS-232C (serial port) is connected

3

to the PC. Use of the connector is determined by the
shape of the PC serial port (see below chart).

Open PC Link-Software.

4

Switch on EL-9400.

5

It is essential to use the same port for both the PC

*

and the PC Link-Software.

Operate according to the instructions on the

6

screen.

program text files into a Program File.

Shape of PC serial port

25 pin (male) Connect the other side (25-pin side) of PC LINK

9 pin (male) terminal of a converting adaptor. Also connect the

8 pin (female) For Macintosh

Connecting procedure

adaptor to the serial
port for the PC.

Connect the other side (25-pin side) of PC LINK
adaptor to the 25-pin

other side (9-pin side) of the converting adaptor to
the serial port for the PC.

EL-9400 Graphing Calculator

CE-450L

Communication cable

EL-9400 EL-9400

S

et to set communication

Transfer data between two EL-9400 calculators using the communication cable (CE-450L).

Communication Procedure

Plug the cable into both calculators.

1

Turn power on.

2

Receiver

3

( or )

Specified LINK.

4

( or 2 )

Select LINK/RECEIVE.

7

8

9

Select SEND/ALL.

]

List of sendable data will
appear on screen.

Select ‘LI’, ‘YI’

]

mark desired data to be

*

sent.

Execute Sending function.

]

]

Sender

5

( or )

Specified LINK.

List of the SEND menu

6

( or 1 )

Select LINK/SEND.

A SELECT ....................... Sends files individually as described below.

1 ALL .............................. Selects and displays all files.

2 List ............................... Selects and displays all list files.

3 GraphEq ....................... Selects and displays all graph eqations.

4 Program ....................... Selects and displays all program files.

5 G_Data ......................... Selects and displays all graph data files.

6 L_Data ......................... Selects and displays all list data files.

7 Picture ......................... Selects and displays all picture data files.

8 A~Z, Ø .......................... Selects and displays all fixed memory of A to Z, and Ø

B BACKUP ...................... Menu to send all data of files. Use this

feature to send the entire content.

15

AC adaptor (optional)

OHP Projection Panel

OHP Panel
Controller

CE-450L

The CE-450L is included
for separate use
(see page 15)

System options

EL-9400 Graphing Calculator

OHP System

Use the EL-9400 OHP system with the overhead projector to make classroom presen­tations convenient for the whole class to see.

EL 94T (OHP system)

Procedure

Switch off the OHP Panel Controller.

1

Plug in the cable connector of the OHP Projection Panel straight into the connection terminal of the

2

OHP Panel Controller.

(The optional AC adaptor is recommended for extended use of the OHP Projection Panel.)

Switch on the OHP Panel Controller.

3

Operating the OHP Panel Controller.

4

The OHP Projection Panel display is synchronized with the display of the OHP Panel Controller.
Place the OHP Projection Panel on top of the overhead projector to project images onto the screen.

Turn on the power of the overhead projector.

5

16

Menu tree 1

SET UP

( )

Rad 1 Deg
FloatPt 2 Rad

1 FloatPt
2 Fix

1 1 1 Rect

2 Param2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
0 0

9 3 Grad
Rect
Decimal
Eqn

2nd F SET UP

A

1 Decimal
2 Mixed
3 Improp

1 Eqn
2 Oneline

B DRG

F AMSWER G EDITOR

C FSE D TAB

E COORD

FORMAT

( )

OFF 1 ON
OFF 2 OFF

1 ON
2 OFF

1 Connect
2 Dot

Connect
Sequen

2nd F FORMAT

A

1 Sequen
2 Simul

B EXPRES

E STYLE 2

C Y

1

D STYLE1

MATH

( )

1 log2 1 abs(
2 2

x

2 round(
3 ipart
4 fpart
5 int
6 min(
7 max(
8 lcm(
9 gcd(

1 random
2 nPr
3 nCr
4!

3 fmin(
4 fmax(
5 d/dx(
6

∫

7 dx

MATH

B NUMA CALC C PROB

1
2 '
3 "
4

r

5

g

3 >

1
2

4 ≥
5 <
6 ≤

E ANGLE

F INEQ

1 and
2 or
3 not
4 xor
5 xnor

G LOGIC

4 xy (
5 r x(
6 r y(

3 xy r(

2 dms

1 deg

D CONV

EL-9400 Graphing Calculator

17

Menu tree 2

CALC

CALC

When coordinate system is Rect When coordinate system is Param

( ) ( )

1 Value
2 Intsct
3 Minimum
4 Maximum
5 X_Incpt
6 Y_Incpt
7 Inflec

2nd F CALC

( )

2nd F DRAW

LIST

A OPE

( )

1 sortA(
2 sortD(
3 dim(
4 fill(
5 seq(
6 cumul
7 df_list
8 aug...(

A DRAW

1 ClrDraw
2 Line(
3 H_Line
4 V_Line
5 T_Line(
6 Draw
7 Shade(
8 DrawInv
9 Circle(
0 Text(

B POINT

1 PntON(
2 PntOFF(
3 PntCHG(
4 PxlON(
5 PxlOFF(
6 PxlCHG(
7 PxlTST(

B MATH

1 min(
2 max(
3 mean(
4 median(
5 sum(
6 prod(
7 stdDv(
8 varian(

D REG

01 Med Med
02 ax+b
03 a+bx
04 x

2

05 In
06 log

07 ab

x

08 ae

bx

09 x

-1

10 ax

b

11 x'
12 y'

C L_DATA

1 stoLD
2 RclLD

2nd F LIST

CALC

CALC

1 Value

2nd F CALC

STAT

A EDIT

( )

edit list

Press

B OPE

1 sortA(
2 sortD(
3 SetList
4 ClrList

C CALC

1 1_Stats
2 2_Stats

STAT

ENTER

D LINE

select
line type

Press

ENTER

DRAW

C ON/OFF

1 DrawON
2 DrawOFF

F PICT

1 StoPict
2 RclPict

G SHADE

1 SET
2 INITIAL

E G_DATA

1 StoGD
2 RclGD

EL-9400 Graphing Calculator

18

Menu tree 3

ZOOM

A ZOOM B FACTOR D EXP E TRIG

( )

1 Auto
2 Box
3 In
4 Out
5 Default
6 Square
7 Dec
8 Int
9 Stat

F STO

1 StoWin

G RCL

1 StoWin
2 PreWin

1 10

x

2 e

x

3 log x
4 In x

1 sin x
2 cos x
3 tan x
4 sin

-1

x

5 cos

-1

x

6 tan

-1

x

Set factor
of zoom

Press

ZOOM

ENTER

PROGM-COM

A PRGM D I/O E COORD

(

on Program screen

)

1 Print
2 "
3 Input
4 Wait
5 Rem
6 End

B BRNCH

1 Label
2 Goto
3 If
4 Gosub
5 Return

C SCRN

1 ClrT
2 ClrG
3 DispT
4 DispG

F FORM

1 ExprON
2 ExprOFF
3 Y' ON
4 Y' OFF
5 Connect
6 Dot
7 Sequen
8 Simul

G S_PLOT

1 Plt1(
2 Plt2(
3 Plt3(

H COPY

1 StoLine
2 RclLine

1 Get
2 Send

1 Rect
2 Param

2nd F PRGM

VARS

A EQVARS D L_DATA E G_DATA

( )

B WINDOW C STOWIN

F PICTUR

1 Pict1
2 Pict2
3 Pict3
4 Pict4
5 Pict5
6 Pict6
7 Pict7
8 Pict8
9 Pict9
0 Pict0

G TABLE

1 TBLStrt
2 TBLStep
3 TBLList

H STAT

1 L_Data 1
2 L_Data 2
3 L_Data 3
4 L_Data 4
5 L_Data 5
6 L_Data 6
7 L_Data 7
8 L_Data 8
9 L_Data 9
0 L_Data 0

1 G_Data 1
2 G_Data 2
3 G_Data 3
4 G_Data 4
5 G_Data 5
6 G_Data 6
7 G_Data 7
8 G_Data 8
9 G_Data 9
0 G_Data 0

VARS

Graph equation

Press

Value of
window

Press

Value of
stored window

Press

stat
Press

ENTER

ENTER ENTER

ENTER

C POWER

1

X

2

2

X

-1

3

X

EL-9400 Graphing Calculator

19

Menu tree 4

EQ VAR

A XY

( )

1 Y1
2 Y2
3 Y3
4 Y4
5 Y5
6 Y6
7 Y7
8 Y8
9 Y9
0 Y0

B REGEQN

1 RegEqn
2 a
3 b
4 c
5 r
6 r

2

7 R

2

8 resid

C POINTS

1 x1
2 x2
3 x3
4 y1
5 y2
6 y3
7 Q1
8 Med
9 Q3

B XYT

01 X1T
02 Y1T
03 X2T
04 Y2T
05 X3T
06 Y3T

VARS A

WIN VAR

A XY

( )

1 Xmin
2 Xmax
3 Xscl
4 Ymin
5 Ymax
6 Yscl
7 X_Fact
8 Y_Fact

B T

1 Tmin
2 Tmax
3 Tstep

VARS B

ZOOM VAR

A STOXY

( )

1 Zm_Xmin
2 Zm_Xmax
3 Zm_Xscl
4 Zm_Ymin
5 Zm_Ymax
6 Zm_Yscl

B STOT

1 Zm_Tmin
2 Zm_Tmax
3 Zm_Tstp

VARS C

STAT VAR

( )

VARS H

A XY

01 n

03 sx
04 x
05 xmin
06 xmax

10 y
11 sy
12 y
13 ymin
14 ymax
15 ∑y07 ∑x
16 ∑y

2

08 ∑x

2

09 ∑xy

02 x

A EXEC

01
02
03
04
05
06

01
02
03
04

Cleate
new program

05
06

B EDIT C NEW

PRGM

07 X4T
08 Y4T
09 X5T
10 Y5T
11 X6T
12 Y6T

( )

PRGM

Press

ENTER

EL-9400 Graphing Calculator

20

Menu tree 5

1 Y X

2

5 Y sinX
6 Y tanX

2 Y X
3 Y 1/X
4 Y e

x

4 Y e

x

5 Y lnX
6 Y sinX
7 Y tanX
8 Y X

B CHANGE

A SHIFT

1 Y X

2

2 Y X
3 Y X

1 Y X

2

2 Y AX+B
3 Y
4 Y 1/X
5 Y sinX
6 Y tanX
7 Y cos

-1

X

8 Y lnX

A B-IN

X

1 MBox

•

2 MBox+
3 MBox

1 Scattr

•

2 Scattr+
3 Scattr

F MBOX

G S.D.

1 xyLine

•

2 xyLine+
3 xyLine

H XYLINE

1 Broken

•

2 Broken+
3 Broken

1 Norm

•

X
2 Norm+_X
3 Norm _X
4 Norm

•

_Y
5 Norm+_Y
6 Norm _Y

B B.L. C N.P.

STAT PLOT

Stat plot1 Stat plot2 Stat plot3 1 SET 1 PlotON

2 PlotOFF2 LimON

3 LimOFFPress Press

Press

2nd F STATPLOT

B PLOT2A PLOT1 C PLOT3 D LIMIT

E ON/OFF

OPTION

( )

Remain
12345bytes

Press

1 List
2 GraphEq
3 Program
4 Picture
5 G-Data
6 L-Data
7 Entry

1 SEND 1 default

2 All mem2 RECEIVE

2nd F OPTION

B MEMCHKA CTRST C DEL D LINK E RESET

STAT GRAPH

( )

1 Hist 1 NormDis 1 Box

2nd F STATPLOT on PLOT1-3screen

A HIST D N.D. E BOX

SLIDE

( )

SLIDESHOW

SHIFT/CHANGE

( )

SHIFT/CHANGE

(

)

2nd F

ENTER ENTER

ENTER

ENTER

EL-9400 Graphing Calculator

21

Menu tree 6

Y=

( )

RECT MODE

Y1=
Y2=
Y3=
Y4=
Y5=
Y6=
Y7=
Y8=
Y9=
Y0=

PAR MODE

X1T=
Y1T=
X2T=
Y2T=
X3T=
Y3T=
X4T=
Y4T=
X5T=
Y5T=
X6T=
Y6T=

Y=

( 1)

2nd F DOPTION

LINK

ENTER

B BACKUP

back up

Press

A SELECT

1 All
2 List
3 GraphEq
4 Program

5 G_Data
6 L_Data
7 Picture
8 A Z,

EL-9400 Graphing Calculator

22

Dimensions W x D x H (mm) 163 x 76 x 19.5 (without hardcase)

Power AAA x 4

Backup Battery CR2032 x 1

Size (dot) 96 x 64

Line x Characters 8 x 16

Character Size (dot) 5 x 7

Digits (mantissa + exponent) 10 + 2

Display

Total Memory Size 32 KB

Constant Memory 27 + last answer memory

Protective hard case

Memory

CE-450L Unit-to-unit communications cable

CE-LK1 PC-Link (Print screen/Data storage)

EL-94T OHP system (includes controller)

Peripheral

Accessory

Equation editor, Shift/Change, Slide show (Built-in), Rapid graph,
Rapid window, Rapid zoom, List grouping

Function graphing Up to 10

Parametric graphing Up to 6

Zoom, Trace

Table of function values

GraphingStandard

Features

Regression models 10

Scatter Plots and Histograms

Box-and-Whisker Diagrams

Statistics

List Up to 6 (Maximum length : 999)

Programming

Trigonometry functions (including sec, csc, cot)

Fraction/Decimal conversions

Last entry recall

Last answer recall

Other

Features
unique to
Sharp

* Design and specifications are subject to change without notice.
* Some products may not be available in some countries.

Specifications

EL-9400 Graphing Calculator

Specifications

23

EL-9400 Graphing Calculator

SET UP

1

Y =

X/T X/T X/T

1

1

Rectangular coordinate graphs

Example

Use rectangular coordinate to enter two graph equations
and shade the area surrounded by the graphs

Before carrying out the following operation, press the reset switch located on the back of the unit and press

keys (caution: previously entered equations and memory will be erased).

1

2

3

4

7

Display

NotesKey Operation

Specify Rect mode on the screen.

As shown, Rect corresponds to

]

shows the initial settings of the
EL-9400.

Enter graph equation
“7sinX+X” at Y1.

Enter graph equation
“X+1” at Y2.

Display the graph.

. The example

]

5

6

Specify the area surrounded by the two
graph equations to be shaded. (Y2<Y<Y1
on screen shows area to be shaded as
larger than Y2 and smaller than Y1).

Return to the graph display and the specified
area will be shaded.

EL-9400 Graphing Calculator

3

X/T

1 0

1

2

2

Y =

X/T

x

2

CALC function

Example

Use the CALC function to solve graph equations
(The coordinate axis is rectangular coordinates.)

Before carrying out the following operation, press the reset switch located on the back of the unit and press

keys (caution: previously entered equations and memory will be erased).

1

2

3

4

0 5

5

7

Display

NotesKey Operation

Enter the graph equation

2

-5” at Y1.

“0.5X

Enter the graph equation
“4 X+7-10 ” at Y2.

Display the graph.

Specify the value of X to find the value
of Y, by specifying the value of CALC.

5

6

7

Enter “3” as the value of X and the
value of Y is calculated.

]

The values X and Y appear at the bottom of the
screen and the cursor appears at the
corresponding point on the graph.

Specify “Intsct” function to calculate the
intersection point of the two graphs.

]

After completion of the calculation, the values of
the X,Y intersection will appear at the bottom of
the screen, and the cursor will appear at the
corresponding point on the graph, as before.

The graph is intersected at two points.
Carry out the same operation as in
to find the second intersection.

After completion of the calculation, the values of

]

the X,Y intersection will appear at the bottom of
the screen, and the cursor will appear at the
corresponding point on the graph, as before.

]

]

]

EL-9400 Graphing Calculator

SET UP

2

6

6

1

Statistics calculations

Example

10 students achieved the following results in a mathematics examination. Draw a
graph to classify these results into top, bottom and average score.

Exam results: 68, 73, 92, 86, 78, 95, 69, 75, 82, 81

Before carrying out the following operation, press the reset switch located on the back of the unit and press

keys (caution: previously entered equations and memory will be erased).

1

2

3

4

5

2

7 3 2

6 7 5

7 5 2

1

Display

NotesKey Operation

Specify two figures after the decimal
point on the set up screen.

Enter all the exam results into the
list L1.

Select the variable quantity of the
statistics from the statistics mode.

Specify the list L1 containing the
exam data.

Calculates the quantity of the
statistics such as average, standard
deviation, total and bottom score.

6

7

8

Set the screen for the various
specified values in order to draw
the statistical graph with PLOT1.

Input of the specified values for drawing
a histogram from the list L1 of the
statistical quantity has been completed.

on/off: set whether to graph or not

]

DATA: select variable 1(X) or variable 2 (XY).
List X: set the list of the corresponding graph.
Freq: set frequency
GRAPH: set graph format

Draw the graph by setting the most
suitable screen for the statistical
graph.

]

EL-9400 Graphing Calculator

SHARP CORPORATION

OSAKA, JAPAN

FAX: [phone]

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FD0094N@ SHARP CORP.(FEB‘98PROD.) H0.5E Printed in Hong Kong