Answer:
-1
Step-by-step explanation:
slope = y2-y1 / x2-x1
= -1 -3 / 3+1
= -4/4
= -1
equation: y-y1=m(x-x1)
plug in: 3-(-1)=m(-1-3)
3+1=m(-1-3)
4=m(-4)
m= -1
