Question

find relation between x and y if the points (x,y),(1,2) and (7,0) are Collinear
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Answer 1

Answer:

As points are collinear,

Area =0

So, Using formula,

x (2)+ 1 (-y) + 7 (y-2) = 0

2x -y +7y -14=0

2x +6y-14=0

or x+3y=7.