Question

The midpoint of start overline, AB, end overline
AB
is M, left parenthesis, minus, 2, comma, minus, 6, right parenthesisM(−2,−6). If the coordinates of AA are left parenthesis, minus, 3, comma, minus, 4, right parenthesis(−3,−4), what are the coordinates of BB?

Answer 1

Use the midpoint formula: M = ((x_A + x_B)/2, (y_A + y_B)/2).

So
-2 = (−3 + x_B)/2 → −4 = −3 + x_B → x_B = −1
−6 = (−4 + y_B)/2 → −12 = −4 + y_B → y_B = −8

Thus B = (−1, −8).