Question

in what ratio does the y axis divide the line segment joining the points (5, - 6) and (-1, - 4)

Answer 1

see use section formula
let ratio be k:1, and point on y axis =(0,y)
so by section formula
(k.5+1.(-1))/(k+1) = 0
so by cross multiplication 
5k=1
k=1/5
therefore ratio is 1:5
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