Writing and Graphing Inequalities

Overview

Goal. Write inequalities from words and real situations, decide whether a value is a solution, and graph an inequality on a number line using an open or filled circle and the correct shading.

Solution of an inequality (definition). A value of the variable that makes the inequality true. An inequality usually has infinitely many solutions, so its answer is a graph, not a single number.

Inequality symbols, testing solutions, and number-line graphs.

Lesson Notes

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Notes page

Lesson Video

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Interactive Activity

Goal. Translate words and situations into inequalities, test whether a value is a solution, and graph inequalities on a number line.

Solution of an inequality (definition). A value of the variable that makes the inequality true. Most inequalities have infinitely many solutions.

Writing and Graphing Inequalities — Interactive ActivityOpen ›