Lesson Plan: Lesson plans were written by Maryland mathematics educators and could be used when teaching the concepts.
 Goal 1 Functions and Algebra Expectation 1.2 The student will model and interpret real-world situations using the language of mathematics and appropriate technology. Indicator 1.2.2 The student will solve linear inequalities and describe the solutions using numbers, symbols, and/or graphs.

Lesson Content

Linear Inequalities

Objectives

• Students will use technology to graph and evaluate linear inequalities.
• Students will write and manipulate inequalities for use on a graphing calculator.
• Students will use knowledge of intercepts to analyze inequalities.

Calculator Skills

• Entering and evaluating inequalities on a graphing calculator.
• Using the trace and intercept capabilities of the calculator.

Class discussion

Lesson Structure

Concept Development for this lesson uses the following worksheet: Lilies and Daisies.
Teacher tips for using Lilies and Daisies

Evaluating Inequalities Using the Calculator

Have students work in pairs to write an inequality for the given situation and solve the inequality in slope-intercept form.

Exploration

Students will enter the inequality into the calculator to get an appropriate picture of the situation. Students will answer questions using the calculator and mathematical reasoning about the inequality.

Class Discussion

Students will explain the mathematical knowledge used to answer various questions throughout the lesson.