# If M (-2, 5) is the midpoint of AB and the coordinates of A are (4, 7), what are the coordinates of B?

$\left(- 8 , 3\right)$
The coordinates are ordered pairs with the $x$ value listed first.
The change in the $x$ position is $4 - - 2 = 6$
The change in the $y$ position is $7 - 5 = 2$
Since the midpoint is halfway between A and B, the change will stay the same, so $x$ is $- 2 - 6 = - 8$ and $y$ is $5 - 2 = 3$