Texas Instruments -84 Plus, Manual Book

Page: 477 / 696

Chapter 17: Activities 474
Zooming In on the Graph Zooming In on the Graph Zooming In on the Graph Zooming In on the Graph
To help identify maximums, minimums, roots, and intersections of functions, you can
magnify the viewing window at a specific location using the
ZOOM
instructions.
1. Press
q
to display the
ZOOM
menu.
This menu is a typical TI-84 Plus menu.
To select an item, you can either press
the number or letter next to the item, or
you can press
†
until the item number or
letter is highlighted, and then press
Í
.
2. Press
2
to select
2:Zoom In
.
The graph is displayed again. The cursor
has changed to indicate that you are
using a
ZOOM
instruction.
3. With the cursor near the maximum value
of the function, press
Í
.
The new viewing window is displayed.
Both
Xmax
N
Xmin
and
Ymax
N
Ymin
have
been adjusted by factors of 4, the default
values for the zoom factors.