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3-2-8
Using the Graph Window
u
To use factor zoom
Example: To enlarge the graphs of the following two expressions, by a factor of 5 in both
directions, to determine whether they come into contact with each other
y
1 = (
x
+ 4)(
x
+ 1)(
x
– 3)
y
2 = 3
x
+ 22
(1) On the application menu, tap
T
.
(2) On the Graph Editor window, input
y
1 = (
x
+ 4)(
x
+ 1)(
x
– 3) and
y
2 = 3
x
+ 22.
• For details about how to input an expression, see “Function Storage and Graphing
Example” on page 3-1-7 and “3-3 Storing Functions”.
(3) Tap
6
to display the View Window, and then configure it with the following
parameters.
xmin = –8, xmax = 8, xscale = 1
ymin = –30, ymax = 30, yscale = 5
• See “To configure View Window parameters” on page 3-2-1.
(4) Tap
$
to graph the functions.
(5) Tap [Zoom] and then [Factor].
• This displays a dialog box for configuring
x
- and
y
-axis zoom factor settings.
u
To use box zoom
Example: To use box zoom to enlarge part of the graph
y
= (
x
+ 5)(
x
+ 4)(
x
+ 3)
(1) On the application menu, tap
T
.
(2) On the Graph Editor window, input
y
= (
x
+ 5)(
x
+ 4)(
x
+ 3).
• For details about how to input an expression, see “Function Storage and Graphing
Example” on page 3-1-7 and “3-3 Storing Functions”.
(3) Tap
$
to graph the functions.
(4) Tap [Zoom] and then [Box], or tap
Q
.
(5) On the Graph window, drag the stylus to draw a selection boundary around the area
you want to enlarge.
(6) Remove the stylus from the display and the area within the selection boundary expands
to fill the entire Graph window.
Box Zoom Result