Question

2. In each of the following find the value of 'K', for which the points are collinear
(i) (8,1), (k,-4), (2,-5)
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Answer 1

Answer:

Foe lines to be collinear, their slope would be equal.

Slope = y2 -y1 / x2 -x1

i.e. -4 -1/k -1 = -5-1/2-8

-5/k -1 = -6/-6

k-1 = -5

k = -4