Plot the following and check weather they are collinear or not - (1,2),(2,-1) (-1,4)
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Step-by-step explanation:
Let A(1,2), B(2,-1) C(-1,4)
suppose Slope = m
when the points are said to be collinear their slopes are equal
Therefore,mAB =mBC = mAC
slope m = (y2-y1)/(x2-x1)
mAB = (-1-2)/(2-1) => -3/1 => -3
mBC = (4-(-1))/(-1-2) => (4+1) /(-3) => -5/3
mAC = (4-1)/(-1-1) => 3/-2 => -3/2
the slopes are not equal
therefore they are not collinear
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