using distance formula find the value of k if the points A(2,3), B(4,k), and C(6,-3) are collinear
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y2-y1/x2-x1=y3-y2/x3-x2
k-3/2=-3-k/2
k-3=-3-k
k=0
k-3/2=-3-k/2
k-3=-3-k
k=0
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