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Getting Started 13
You can magnify the viewing window around a specific location using the Zoom
instructions to help identify maximums, minimums, roots, and intersections of
functions.
1. Press
q
to display the
ZOOM
menu.
This menu is typical of TI
-
80 menus. To select an
item, you may either press the number to the left of
the item, or you may press
until the item number is
highlighted and then press
Í
.
2. To
ZOOM IN
, press
2
. The graph is displayed again.
The cursor has changed to indicate that you are using
a Zoom instruction.
3. Use
|
,
}
,
~
, and
to position the cursor near the
maximum value on the function, and press
Í
.
The new viewing window is displayed. It has been
adjusted in both the
X
and
Y
directions by factors of
4, the values for Zoom factors.
4. Press
p
to display the new window variable
values.
Zooming In on the Graph
25


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