Answer:

Step-by-step explanation:
The equation for slope is:

We can substitute the given coordinates into the equation:

The slope is -3
The equation for a line is:

m: slope
b: y-intercept
x, y: (x, y) coordinate pair
Now, plug in the slope and one of the (x, y) coordinate pairs to solve for the y-intercept.

Therefore the equation is:
