Sharp El 9400 User Guide

							Graphing Calculator
EL-9400
TEACHERS’ GUIDE 
						

							Built-in slide shows
Educational tools
(OHP/PC-link/Data collection)
Shift/Change function
Equation editor
Split displayLarge display
Rapid graph
Rapid window
Rapid zoom
Easy to Teach
Easy to LearnEasy to Use
Introduction
ContentsSales 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 13System 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. 
						

							EL-9400 Graphing Calculator
1
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
2
Basic operation
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
Function keys
Y = 
EZ
Names of parts
Communication port for peripheral devices
Power off Power on
CLErase equations and
remove error displays
Power ON/OFF
a a a aaaaaaa a aaaaa
QUIT
CLCancel of previous
function (Escape)aaa
Graphing keys
Power supply ON/OFF key
Alphabet specification key
Secondary function
specification key
1
2
3
4
5
6
7
8
9Display screen
Cursor movement keys
Clear/Quit key
Variable enter key
Calculation execute key
10 
						

							EL-9400 Graphing Calculator
3
Reset function
1) When trouble occurs
Press 
   to enter the reset mode.
• 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.
SET UP menu
Press  SET UP .
¥ Contents displayed on the right side of
the screen are the current settings.
Adjusting screen contrast
• The contrast adjust screen will appear
when pressing
 .
Press 
 to lighten contrast.
Press 
 to darken contrast.
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:There may be differences in the results
of calculations and graph plotting
depending on the SET UP settings.
]
] 
						

							EL-9400 Graphing Calculator
NotesKey OperationDisplay
Example
4
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.
1
2
5
4
3
6Input the equation and see how it can be easily
viewed with the equation editor.
CL
01
a/b2
a/b1
x2
Clear the display.
Select CALC and
Enter the range of the integral.
Complete equation input.
Calculate the expression.
The blinking mark in the upper right
side of the display indicates the
expression is being calculated.
Enter
(or   6 )
(or 
  0 7 )
]
]
X/T
X/T
(Integral function) 
						

							EL-9400 Graphing Calculator
NotesKey OperationDisplay
Example
5
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.
When the graph of  y = x2 is shifted downward,
how does this affect the equation?
Select the location of the shift:
move cursor down twice. Enter 
SHIFT/CHANGE mode.1
2
3
4
5
Select shift. Cursor moves to the
equation menu.
Select the equation: y = x
2  and
draw the graph.
View the result of the shift.
SHIFT/CHANGE
(Change the location of graphs)
y = x2
y = x2-2
Features
If SHIFT is not already
highlighted press  .]
]
]
] 
						

							EL-9400 Graphing Calculator
NotesKey OperationDisplay
Example
6
When the graph of y = x2 is changed,
how does it affect the equation?
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.
Enter SHIFT/CHANGE mode
and specified (
CHANGE).1
3
4
5
2Select change. Cursor will move
to the equation menu.
Select the equation: y = x
2 and
draw the graph.
View the result of the change. Select the location of the
change: increase the value of y-
coordinates.
SHIFT/CHANGE
(Change the shape of the graphs)
Features
y = x2
y = 2x2]
] 
						

							EL-9400 Graphing Calculator
NotesKey OperationDisplay
Example
7
Slide show
Slide show assists with teacher preparation. By selecting from the built-in options or cre-
ating your own series of slides, you can demonstrate lessons with minimum preparation
time.
Use the built-in slide show of y = x2 to show how the
coordinates change as you move along the graph.
Select y = x2 and the first slide
appears.
Moving between the values you
can follow the changes in the
graph’s coordinates, making the
nature of the graph easier to
understand. Specified 
SLIDE SHOW mode.1
2
4
3
Begin the slide show by press-
ing the         cursor key. Select the built-in menu.
Features
* View the selection of built-in slide shows
on the following pages. 
						

							EL-9400 Graphing Calculator
8
Built-in slide show selections
1) Y=X22) Y=AX+B
4) Y=1/X
Features
3) Y=  X