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Answers and rating deltas for

Is this the correct way to test to see if two lines are colinear?

Author Votes Δ
parapura rajkumar 2 +1.82
sarnold 1 -0.04
Mark Ransom 1 -0.28
INS 0 -1.51
Last visited: Sep 14, 2014, 5:07:29 AM