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Mark the tick against the correct answer in the following:

Question:

Mark the tick against the correct answer in the following:

If the points $A(3,-2), B(k, 2)$ and $C(8,8)$ are collinear then the value of $k$ is

A. 2

B. $-3$

C. 5

D. $-4$

Solution:

$\Rightarrow 10 k-50=0$

$\Rightarrow k=5$