## Lesson: Graphing Integers

Introducing the Concept

Students learned about linear equations earlier. Now they will review how to solve those equations and learn how to graph linear equations in *x* and *y.*

**Materials:** overhead transparency or poster paper

**Preparation:** Draw a coordinate grid on a transparency or poster paper, or use Learning Tool 20 in the *Learning Tools Folder.*

**Prerequisite Skills and Concepts:** Students should know how to graph ordered pairs. They should also be able to solve simple addition, subtraction, multiplication, and division linear equations.

Write the equation *x *− 3 = *y *on the board.

xx − 3 = yy(x, y)Put 2, 2 − 3 =

^{-}1,^{-}1, and (2,^{-}1) in the appropriate columns of the first row, as in the table shown.

xx − 3 = yy(x, y)2 2 − 3 = ^{-}1^{-}1(2, ^{-}1)