Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 311

7. Press Í.
The trace cursor jumps to the point on
the function evaluated at
Y1
8. Press | and ~ until you are on the
maximum value.
Y
This is the maximum of
pixel values. The actual, precise
maximum may lie between pixel values.
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
1. Press q to display the
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 to select
2 2:Zoom In
The graph is displayed again. The cursor
has changed to indicate that you are
using a instruction.
ZOOM
3. With the cursor near the maximum value
of the function, press Í.
The new viewing window is displayed.
Both and
Xmax Xmin
N
been adjusted by factors of 4, the default
values for the zoom factors.
4. Press | and ~ to search for the
maximum value.
5. Press p to display the new window
settings.
: To return to the previous graph,
Note
press q ~
1:ZPrevious
.
X=3.8
for the
Y1(X) X
ZOOM
menu.
ZOOM
.
have
Ymax Ymin
N
.
instructions.
Chapter 17: Activities 304