Question

Find the coordinates of the midpoint of JK if J (-9, 5) and K(21, -7).

Answer 1

You have to do (-9 + 21)/2 getting 6. That is the x-coordinate of the midpoint. Then, you do the same thing to the y-coordinates. (5 + -7)/2 getting -1. So the midpoint is (6, -1).
You take the average of the x-coordinates which gets you the x-coordinate of the midpoint then the same thing for the y-coordinates.

Answer 2

thanks, that makes this easier :)

Answer 3

No problem! (: