Question

Find k given that these three points are collinear.
A(0, -2), B(2, 0), and C(5, k)

Answer 1

k = 3.

Explanation:

If they are collinear the slope of AB = the slope of BC, so :-

(0- (-2)) / (2 - 0) = (k - 0) / (5 - 2)

2/2 = k/3

1 = k/3

k = 3.