Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 310

4. Press Í. The expression is
evaluated, and
10
Press Í to accept
Í
5. Press
0 500
Í to define the remaining window
variables.
Displaying and Tracing the Graph
Now that you have defined the function to be graphed and the window in which to graph it, you can
display and explore the graph. You can trace along a function using the
1. Press s to graph the selected
function in the viewing window.
The graph of
Y1=(20
displayed.
2. Press ~ to activate the free-moving
graph cursor.
The and coordinate values for the
X Y
position of the graph cursor are
displayed on the bottom line.
3. Press |, ~, }, and † to move the free-
moving cursor to the apparent maximum
of the function.
As you move the cursor, the
coordinate values are updated
continually.
4. Press r. The trace cursor is
displayed on the
Y1
The function that you are tracing is
displayed in the top-left corner.
5. Press | and ~ to trace along
dot at a time, evaluating
You also can enter your estimate for the
maximum value of
Ë
6. Press . When you press a number
3 8
key while in
TRACE
displayed in the bottom-left corner.
is stored in .
Xmax
as .
Xscl 1
Í Í
100 1
is
N 2X)(25 à 2 N X)X
and
X Y
function.
, one
Y1 X
at each .
Y1 X
.
X
, the prompt is
X=
feature.
TRACE
Chapter 17: Activities 303