# How do you find the slope & y-intercept of the equation y = -3x + 9?

Dec 7, 2015

The slope is -3
The y-intercept is 9

#### Explanation:

The slope is the rate at which y changes with x.
In this equation the rate is -3x.
So for every 1 unit of x, y decreases by 3.

The y intercept is the point where x=0.
In this case, the y intercept is 9
$y = - 3 \left(0\right) + 9 = 9$