Respuesta :

Midpoint formula is x1+x2 divided by 2 and
y1+y2 divided by 2 
So take -1+3/2 and 7+-3/2 
The midpoints are (1,2)

m = (x1 + x2)/2 , (y1 + y2)/2
m = (-1 + 3)/2 , (-3 + 7)/2
m = 2/2 , 4/2
m = (1,2) <===