Chapter 17: Activities 483
Graphing InequalitiesGraphing InequalitiesGraphing InequalitiesGraphing Inequalities
Problem
ProblemProblem
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
ProcedureProcedure
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.