Texas Instruments TI-83 PLUS - Manual (Page 569)

TI-83 Plus Activities 566
Graphing Inequalities
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
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 Y 4
and the right side as Y 5
.
3. Enter the statement of the inequality as Y 6
. This function evaluates to
1 if true or 0 if false.