Chapter 9: Function Graphing 181
7309ENG.DOC CH 9 Function Graphing, English Julie Hewlett Revised: 07/29/98 12:14 PM Printed: 05/19/99
9:01 AM Page 181 of 24
Adjusting Window Values with the(
ZOOM Menu
The ( ZOOM menu items allow you to adjust the viewing
WINDOW of a graph quickly in a variety of ways. From the
Graph screen, press ' to see the adjusted WINDOW
values.
1:ZBox, 2:Zoom In, and 3:Zoom Out, require you to move the
cursor first to define the viewing window.
(
1:ZBox Lets you draw a box around a specific
section of the Graph screen. The calculator
then zooms in on the area inside the box.
2:Zoom In Lets you select a point with the cursor keys.
The calculator then zooms in around the
point by an amount defined by SetFactors
(found on the ( MEMORY menu).
3:Zoom Out Lets you select a point with the cursor keys.
The calculator then zooms out around the
point by an amount defined by SetFactors.
4:ZQuadrant1 Displays Quadrant I only. Replots the graph
immediately.
5:ZSquare Adjusts WINDOW variables so that a square
or a circle is shown in correct proportion
(instead of a rectangle or an ellipse).
Replots the graph immediately.