Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 309

7. Press † or } to move the cursor to
Press ~ to move the cursor into the
column.
The value of at
Y1
the bottom line in full precision as
.
410.261226
8. Press † to display the other maximum.
The value of at
Y1
is , at
410.264064 X=3.69
at is
X=3.7 410.256
The maximum volume of the box would
occur at if you could measure and
3.68
cut the paper at .01-centimeter
increments.
Setting the Viewing Window
You also can use the graphing features of the TI-84 Plus to find the maximum value of a previously
defined function. When the graph is activated, the viewing window defines the displayed portion of
the coordinate plane. The values of the window variables determine the size of the viewing
window.
1. Press p to display the window
editor, where you can view and edit the
values of the window variables.
The standard window variables define
the viewing window as shown.
, , and
Xmax Ymin Ymax
boundaries of the display.
define the distance between tick marks
on the and axes.
X Y
resolution.
Í to define
2. Press
0
¥
3. Press to define
20 2
expression.
: For this example, the division sign
Note
is used for the calculation. However, you
can use n/d entry format where fraction
output can be experienced, depending
on mode settings.
.
3.67
Y1
is displayed on
X=3.67
in full precision
X=3.68
is and
410.262318
.
,
Xmin
define the
and
Xscl Yscl
controls
Xres
.
Xmin
using an
Xmax
Chapter 17: Activities 302