This is one in my series of lessons using the graphing calculator for Algebra Classes. This one is for any Algebra level or PreCalculus. Students should have completed the worksheets on solving equations prior to doing this lesson. Students use the graphing calculator to graph both sides of the inequality and to determine the solution. It is assumed that students will have had work with inequalities prior to this lesson. This is a great way to show the students a visual representation of the solution for inequalities in two dimensions. Although the worksheet states that the algebraic method will be learned later, this lesson can be done either before or after the lesson instructing the methods to solve these inequalities algebraically. In fact, the last page will ask students to compare their graphing answers to the algebraic answers.
Students can do the work in groups or individually. NO answer key - I usually go over the worksheet with them using a projection unit so they can see the graph and we can discuss their results.