If the points A (x,y), B (1,4) and C (-2,5) are collinear, then shown – InterviewSolution

1.	If the points A (x,y), B (1,4) and C (-2,5) are collinear, then shown that x + 3y = 13.
Answer» Given points are collinear `therefore" ""Area of triangle"=0` `implies" "1/2[x(4-5)+1(5-y)-2(y-4)]=0` `implies" "-x+5-y-2y+8=0` `implies" "x+3y=13`

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