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 :)
