Question 509708
Use the Midpoint Formula,
(X1 + x2 /2), (Y1 + y2 /2)

(-8,7) (-2,8)

X1 = -8 
x2 = -2

Y1 = 7 
y2 = 8

(-8 + -2 /2), (7 + 8 /2)

Midpiont = (-5,7.5)