Texas Instruments -84 Plus, Manual Book

Page: 486 / 696

Chapter 17: Activities 483
Graphing Inequalities Graphing Inequalities Graphing Inequalities Graphing Inequalities
Problem
Problem Problem
Problem
Graph the inequality 0.4x
3
N
3x + 5 < 0.2x + 4. Use the
TEST
menu operations to explore
the values of X where the inequality is true and where it is false.
Procedure Procedure Procedure Procedure
1. Press
z
. Select
Dot
,
Simul
, and the default settings. Setting
Dot
mode changes
all graph style icons to
í
(dot) in the
Y=
editor.
2. Press
o
. Turn off all functions and stat plots. Enter the left side of the inequality as
Y4
and the right side as
Y5
.
3. Enter the statement of the inequality as
Y6
. This function evaluates to
1
if true or
0
if
false.
4. Press
q
6
to graph the inequality in the standard window.
5. Press
r † †
to move to
Y6
. Then press
|
and
~
to trace the inequality,
observing the value of
Y
.