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Chapter 4 Graphing
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k Zoom
The zoom feature lets you enlarge and reduce a graph on the display.
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uBefore using zoom
Immediately after drawing a graph, press !2 (ZOOM) to display the Zoom Menu.
!2(ZOOM)
1 (BOX) ....... Graph enlargement using box zoom
2 (FACT) ...... Displays screen for specification of zoom factors
3 (IN) ........... Enlarges graph using zoom factors
4 (OUT) ....... Reduces graph using zoom factors
[
1 (ORIG)...... Original size
Press [ to return to the previous menu
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uTo use box zoom
With box zoom, you draw a box on the display to specify a portion of the graph, and
then enlarge the contents of the box.
Example To use box zoom to enlarge a portion of the graph y = (x + 5)
(
x + 4) (x + 3)
Use the following View Window parameters.
Xmin = –8 Ymin = –4
Xmax = 8 Ymax = 2
Xscl = 2 Yscl = 1
1. After graphing the function, press !2 (ZOOM).
!2(ZOOM)
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