# How do you write the equation of the horizontal line passing through (-8,9)?

Jul 24, 2016

$y = 9$

#### Explanation:

The equation of any horizontal line is $\text{y = .. a number}$

The x-value has no effect on the equation or on the line at all, as long as y-value stays the same.

In this case the line passes though the point $\left(- 8 , 9\right)$ which tells us that the y-value we want is 9.

Therefore the equation is $y = 9$