Find the value of for which the points are collinear.

MATHEMATICS · Single correct · A Level · Mathematics · Coordinate geometry in the (x y) plane · Coordinate geometry in the (x y) plane

Problem

Find the value of kk for which the points (k,4), (2,5), (4,9)(k,4),\,(2,5),\,(4,9) are collinear. (a) 52\dfrac52 (b) 32\dfrac32 (c) 44 (d) 72\dfrac72

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