Vertical Line
Vertical lines are lines that go straight up and down as you can see in the picture below:
Vertical Line Picture

Horizontal Line Picture

Other traits of Vertical lines
 The equation of a vertical line does NOT have a yintercept since a vertical line never crosses the yaxis.
 The slope of a vertical line is undefined because the denominator of the slope (the change in X) is zero
 Vertical lines help determine if a relation is a function in math.
 The equation of a vertical line always takes the form x = k
 where k is any number and k is also the xintercept. For instance in the graph below, the vertical line has the equation x = 2 As you can see in the picture below, the line goes straight up and down at x = 2
Example 1 of a Vertical Line
Equation : x = 1

General Formula for the equation of a Vertical Line
is x = K where k is the xintercept

Below are several examples of the equation and graph of different vertical lines
Example 1 of a Vertical Line
Equation : x = 1

Example 2 of a Vertical Line
Equation : x = 1


Example 3 of a Vertical Line
Equation : x = 1.5

