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Collinearity of three points can be tested using their:

ASlopes
BWeights
CColours
DVolumes
Answer & Solution
Correct answer: A. Slopes
1. Two of the points fix one slope, another pair fixes a second. 2. If a single line holds all three, those slopes agree. 3. So collinearity is tested with slopes. _Source: syllabus Mathematics, Chapter 10, Straight Lines._
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