User`s guide

Chapter 4 Graphing

k Zoom

The zoom feature lets you enlarge and reduce a graph on the display.

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

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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