Sharp EL-9400 Teachers Manual page 26

R
ectangular 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).
Key Operation
SET UP
1
7
Y =
2
X/T
1
X/T
3
4
5
6
Display
1
X/T
1
EL-9400 Graphing Calculator
Notes
Specify Rect mode on the screen.
As shown, Rect corresponds to
. The example
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.
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.
]