Ok so the midpoint formula is (x1+x2)/2 , (y1+y2)/2
You want to find the midpoint of (-4,8) and (4,-2).
Just plug the numbers in the formula and you get (4-4)/2 , (-2+8)/2 which equals 0/2 , 6/2 which tells you that the midpoint is (0,3).
Your answer should be (0,3)
Hope it helps!