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

2. Horizontal
Think Horizon…left & right.

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

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

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

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

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

10. 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)

12. 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)

14. Practice
Complete #1-8 on pages