Answer:
m=-3/2
Explanation:
In order to solve this problem, you must use the slope formula.
Slope formula:

y2=(-1)
y1=2
x2=1
x1=(-1)
Rewrite the problem down.
Solve.

Therefore, the slope is -3/2, which is our answer.
I hope this helps you! Let me know if my answer is wrong or not.