Basic Function Graphing 314
Zooming In and Out on a Point
•For a
ZoomIn, the x variables are divided by xFact, and the y variables are
divided by
yFact.
new
xmin = xmin/xFact , etc.
•For a
ZoomOut, the x variables are multiplied by xFact, and the y variables are
multiplied by
yFact.
new
xmin = xmin ù xFact , etc.
Changing Zoom Factors
The Zoom factors define the magnification and reduction used by
ZoomIn and ZoomOut.
1. From the „
Zoom menu, select 2:ZoomIn
or
3:ZoomOut.
A cursor appears, and the screen
prompts for
New Center?
2. Move the cursor to the point where you
want to zoom in or out, and then press
¸.
The TI-89 Titanium adjusts the Window
variables by the
Zoom factors defined in
SetFactors.
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