A)
slop intercept form is y=mx+b
To find m, it is (y2-y1)/(x2-x1) or (-8-7)/(2-(-1)) which then = -5
To find b, the y-intercept choose one of the points and solve for b using:
y=x(slope)+b
7= -1( -5)+b
7= 5+b
2=b (subtract 5 on both sides)
I hope this helped!
