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

**Horizontal Line Picture**

**Vertical Line Picture**

**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

### 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 2 of a Vertical Line**

Equation : y = 2