Question

Prove that the pints (2,6),(1,2)and(3,10) are collinear

Answer 1

Answer:

They have th the same slope

Answer 2

Answer:

The gradient of the line through (2, 6) and (1, 2) is

  (6-2)/(2-1) = 4/1 = 4

The gradient of the line through (3, 10) and (1, 2) is

  (10-2)/(3-1) = 8/2 = 4

Therefore these are the same line through (1, 2).

That is, the points (2, 6), (1, 2) and (3, 10) are collinear.

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