Geometry question

Question

If the midpoint of line segment  has coordinates   and  then:

B

Answer 1

B = (-6, -10)

A = (6,0)

midpoint = (0, -5)

x coordinate of the midpoint is the average of the endpoint x coordinates (6-6)/2 = 0

y coordinate of the midpoint is the average of the endpoint y coordinates (-10+0)/2 = -5