Texas Instruments TI-84 - Manual (Page 486)

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 .