Answer:
M = - 3
Explanation:
Find the Slope:
Slope is equal to the change in y over the change in x
, or rise over run.
m =

The change in x is equal to the difference in x-coordinates (also called run), and the change in y is equal to the difference in y-coordinates (also called rise).
m =

Substitute in the values of x and y into the equation to find the slope.
m =

Simplify.
m =

m = -3