Question

A(2,4) and B(6,8) .
find the midpoint of M

Answer 1

8-4/6-2 = 2/4 = 1/2

Answer 2

here's the midpoint formula:

M[(x1+x2)/2 , (y1+y2)/2]

sub your points into this formula and you get: 

M[(2+6)/2 , (4+8)/2] 
 =[8/2 , 12/2]
 =[4 , 6]

therefore, the midpoint M of A(2,4) and B(6,8) is M(4,6)

let me know if you have any other questions regarding how the formula works or what I did

hope it helps :)