## Lesson: Functions and Graphing

Introducing the Concept

Your students may have graphed on a coordinate plane before, but it may not be a skill they have mastered. You will need to review how to graph points, the names of the four quadrants, and terms such as *coordinate plane, ordered pair, x-coordinate, y-coordinate,* and *origin.*

**Materials:** graph paper for students, two worksheets shown below, graph paper for the overhead, a ruler

**Preparation:** Prepare the worksheets shown below with some points graphed on one and some figures (for which students will find the areas) drawn on the other. Use Learning Tool 8 in the *Learning Tools Folder.*

**Prerequisite Skills and Background:** Students should be able to perform the four basic operations, and they should be able to find the area of a triangle and square by using formulas.