Finding Coordinates of Endpoints?

Question

I need help with this problem:

Find the coordinates of the endpoints of a line segment if the coordinates of the other endpoint and midpoint are respectively: (1,-2) and (4,-1).

Thank you.

Answer 1

The line goes (3,1) from the first point to the midpoint. It will do the same for the midpoint to the endpoint.

(4, -1) + (3,1) = (7,0)