Question

The midpoint of AB is M. If the coordinates of M are

(1/2, -2) and the coordinates of B are (6, 1), what are the coordinates of A?

Answer 1

9514 1404 393

Answer:

A = (-5, -5)

Explanation:

Solving ...

M = (A +B)/2

for A, you find ...

A = 2M -B

A = 2(1/2, -2) -(6, 1) = (1-6, -4-1)

A = (-5, -5)