# How do you write an equation of a line given m=0 and b=4?

Mar 29, 2018

$y = 4$

#### Explanation:

If the slope is 0 it means that it does not go up or down as you read left to right on the x-axis.

So it is parallel to the x-axis.
Unusually you have used $b$ for the constant at the end. People normally use $c$.

$y = m x + b$

but $b = 4 \mathmr{and} m = 0$ giving:

$y = 0 \left(x\right) + 4$

$y = 0 + 4$

$y = 4$