Midpoint (M) = (x1 + x2 , y1 + y2)
2 2
Points A and B:
A (7,0)
B (x,y)
M (0 , 9) = ( 0=7 + x, 9=0 + y)
2 2
Solve for the x-coordinate of Point B:
0 = 7 + x
2
-7/2 = x/2
2(-7/2) = x
x = -7
Solve for the y-coordinate of Point B:
9 = 0 + y
2
18 - 0 = y/2
2
9 = y/2
2(9) = y
y = 18
Point B coordinates (-7, 18) Final answer
