69 POINTS PLEASE HELP!!!!!

Which shows how to find the y-coordinate of the point that will divide CD into a 5:2 ratio using the formula y = (y2 – y1) + y1?
A. y=[5/2](3-1)+1
B. y=[5/2](3+4)-4
C. y=[5/7](3-1)+1
D. y=[5/7](3+4)-4