Texas Instruments TI-80 Zooming In on the Graph

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