Question

Find the midpoint, M, of CD.
C = (2,5) D = (-4,1)
M = ([?],[ ])

Answer 1

M= ([-1],[1/2])

The number in the green box is -1

Explanation:

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

M= ([2+(-4)/2], [5+1/2])

M= ([-2/2, 6/2])

M= ([-1, 3])