Lesson 4.3 Graphing Horizontal & Vertical Lines Mr. Beltz & Mr. Sparks

Horizontal Think Horizon…left & right.

Vertical Think of Mr. Beltz’s Vertical Jump in basketball. (Up & Down)

Linear equations Review All linear equations can be written in the form: Ax + By = C

Horizontal Lines Ax + By = C When A = 0 The equation reduces to By = C This results in a HORIZONTAL LINE (Example 1)

Vertical Lines Ax + By = C When B = 0 The equation reduces to Ax = C This results in a VERTICAL LINE (Example 2)

Summary If y = b Horizontal Line If x = a Vertical Line

Writing an Equation of a line. The graph is a vertical line. The x-coordinate is always -2. The equation of the line is x= -2 (Example 3a)

Write an Equation of a line. The graph is a horizontal line. The y-coordinate is always 4. The equation of the line is y=4. (Example 3b)

Practice Complete #1-8 on pages 216-217.