Question

point A is located at (-1,-5) the midpoint of line segment AB is point C (2,3) what are the coordinated of point B

Answer 1

Let B = (x, y). The midpoint formula gives

2 = (−1 + x)/2 and 3 = (−5 + y)/2.

Solve: x = 2·2 − (−1) = 5, y = 2·3 − (−5) = 11.

So B = (5, 11).