Equation of a Horizontal Line


Horizontal lines 'go' perfectly sideways like the red lines pictured below.

Horizontal Line Picture Picture of Vertical Line Graph
Vertical Line Picture Picture of Vertical Line Graph

Properties of Horizontal Lines

Equation of Horizontal Line always takes the form of y = k where k is the y-intercept of the line. For instance in the graph below, the horizontal line has the equation y = 1 As you can see in the picture below, the line goes perfectly sideways at y =1.

Example 1 of a Vertical Line

Equation : y = 1

General Formula for the equation of a Equation Line

is y = k where k is the y-intercept

General Equation of Horizontal Line

Several Examples

Below are several examples of the equation and graph of different Horizontal lines

Example 1 of a Horizontal Line

Equation : y = 3

Example of graph of a Horizontal line
Example 2 of a Vertical Line

Equation : y = 2

Example of graph of a Horizontal line
Example 3 of a Vertical Line

Equation : y =-1

Example of graph of a Horizontal line

back to Lines Home next to Vertical Lines

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