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# confusing question

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Which of the following points is not collinear with (3, 6) and (-2, -9)?

A. (0, -3)
B. (3, 6)
C. (-1, -6)
D. (0, -4)

Aug 14, 2020

#1
+110682
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B is certainly on the line.

gradient = $$\frac{rise}{run}=\frac{-9-6}{-2-3}=\frac{-15}{-5}=\frac{3}{1}$$

So for every 3 the line goes up it runs along 1 in the positive direction so the points on the line will be

(-2,-9)

(-1,-6)

(0,-3)

(1,0)

(2,3)

(3,6)

So which one is not there?

Aug 15, 2020