Using the image below, find the y value for the point that divides the line segment cd into a ratio of 4: 1. segment cd is shown. c is at 9, 6 and d is at 5, 1.

Formula needed:
Division of segment between P1(x1,y1) and P2(x2,y2) in a ratio a:b.

Coordinates of point of division


For the given problem,
C(x1,y1)=C(9,6)
D(x2,y2)=D(5,1)
ratio a:b=  4:1   => a=4, b=1, a+b=5

Point of division 
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=(29/5, 2)

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