Math (Algebra 2)
posted by Hannah .
The points (2,1), (4,0), and (4,k^2) are collinear. What is the value of k?

So the slope between any segment must be the same
slope for first two points:
(01)/(42) = 1/2
slope between 1st and last point:
(k^2  1)/(42) = (k^2  1)/6
so (k^2 1)/4 = 1/2
2k^2  2 = 4
2k^2 = 6
k^2 = 3
k = ± √3
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