Question

The midpoint of AB is M(1, 1). If the coordinates of A are (3, -3), what are the coordinates of b

Answer 1

Midpoint is ( Average of x’s, Average of y’s )

1 = (x + 7)/2

2 = x + 7, x = - 5

and - 1 = (y + (-4))/2

so - 2 = y - 4 and y = 2

Pt B = (- 5, 2)