1. Graphing Horizontal and
Graphing Horizontal & Vertical Lines
Section 4.3
Graphing Horizontal and
Vertical Lines
Goal: Graph horizontal and vertical lines.

2. Vertical Lines: Written in the form of x = h.
Horizontal Lines: Written in the form of y = k. (constant function)
y = 2 x
0x + y = 2 y
0 0(0) + y = 2 2 (0, 2)
1 0(1) + y = 2 2 (1, 2)
5 0(5) + y = 2 2 (5, 2)
–3 0(–3) + y = 2 2 (–3, 2)
(0, 2)
(5, 2)
(–3, 2)
(1, 2)

3. x = 6 x
x = 6 y
6 x = 6 0 (6, 0)
6 x = 6 1 (6, 1)
6 x = 6 5 (6, 5)
6 x = 6 -3 (6, –3)
(6, 5)
(6, 1)
(6, 0)
(6, –3)

4. Horizontal
Vertical
y = 2 y = – y = 8
x = 6 x = –4 x = . 5

5. Homework Assignment #56
4.3 Practice A Sheet