TI-83 Plus Activities 566
Graphing Inequalities
Problem
Graph the inequality 0.4X3 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 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.