Question

Find the value of a if given points are collinear (5,1) (3,2) and (1,a)​

Answer 1

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Answer:

a = 3

Explanation:

The x-values 5, 3, 1 form an arithmetic sequence. The y-values will do the same: 1, 2, a = 1, 2, 3 -- a common difference of +1.

a = 3