Jessica wants to add one more dot to the diagram below so that the four dots form the four vertices of a parallelogram. If A = (3,4), B = (4,-1), C = (6,8), then where should D be to form parallelogram ABCD?
Slope between A and C = (8 -4) / (6 -3) = 2/3
So D = (4 + 3 , -1 + 2) = (7, 1)
+1504 
