Sharp EL-9400 Teachers Manual page 15

Features
R
apid zoom
Rapid zoom offers one-touch adjustment of window size while viewing the graph. No more
guessing or wasting class time to find optimal values for window size.
Example
Adjust the viewing window for y = x
Key Operation
a b
Y = X/T 3
1
x
2
X/T 2
(–)
3
1
(–)
1 5
5
EZ
2
3
4
5
to show the entire graph.
Display
X/T
3
1 5
EL-9400 Graphing Calculator
3 2
+ x - 2x
Notes
Create the graph y = x
using the following conditions:
X-range: xmin = -3
xmax = 3
xscl = 1
Y-range: ymin = -1.5
ymax = 1.5
yscl = 0.5
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).
3 + x 2 - 2x
13