Question

P(5,-3) and Q(3,y) are the points of the line segment joining A(7,-2) and B(1,-5). then y equals to

Answer 1

let  AP\PQ = 1\K

K(7)+1(3)
-------------  = 5
    K+1

7K+3
------- = 5
 K+1

7K+3 = 5K=5

2K = 2

K = 1\1

RATIO = 1:1

NOW RATIO = 1:1

1(-2)+1(y)
------------ =  -3
      2

-6 = -2+y
-4 =  y
so y= -4