Texas Instruments TI-89 Titanium Manual page 12

Working with Graphs Zoom Menu
Using ZoomBox
Start with a function that we can graph: X^3-(x/4)
• Step 1 To get to the "Y=" screen from the home screen, press F1 and
the "Y=" screen will appear.
•
Step 2 Enter in the function as : Y= X^3-(x/4)
•
Step 3 Press F2 and then 4:ZoomDec. This will graph the function.
•
Step 4 Press F2 and then 1:ZoomBox.
•
Step 5 A cursor will appear. Drag the cursor up and to the left of the
area you want to zoom in on. The cursor will create the top left
corner of the rectangle to be zoomed in on. Press enter after selecting
where you want the rectangle positioned.
•
Step 6 Drag the cursor down and you will see the rectangle form.
Drag it to cover the area to zoom in upon. Then press enter. The
calculator will then resize the graph and display the selected zoomed
in area.
•
If you want to return to the original graph; press F2 and scroll down
to B:Memory and select 1ZoomPrev.