Question 108833
If the slopes from point to point are all the same the points are collinear.
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is the points A(2,1),B(-4,1),C(-1,-3) Collinear or noncollinear
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from A to B: slope = 0 
from B to C; slope = (-3-1)/(-1--4) = -4/3
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slopes are not the same so the points are not collinear
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Cheers,
Stan H.