Answer:
-2, or 2/-1
Explanation:
The formula for slope is y2-y1/x2-x1, but you can chose any points to be (x1, y1) and (x2,y2) but in this example, (-2,1) will be pair 1 and (-3,3) will be pair 2 so substitute:
3-1/-3-(-2)=2/-1, which simplifies to -2