Graphing Quadratic Inequalities

We applied rules to graph linear inequalities to our study of parabolas. The rules are very similar. You must determine whether to use a dotted or solid line, and then determine where the shading will go on the graph. To determine the nature of the line defining the parabolic shape, look at the inequality sign. If you see the "<" or ">" sign, the line should be dotted. If a "≤" or "≥" sign is present, then use a solid line to define the parabola. Whenever possible, use the origin, or (0,0), to test your graph for where the shading should go.

Students had about 25 minutes to work on their group projects today. Presentations begin on Tuesday, April 14th.

Tonight's Homework: Read Lesson 9.7, and then do 9.7 ( 7 - 22 all ).