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