JEE Mathematics · Medium

Straight Lines: Collinearity MCQ

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CollinearityMediumQuestion 300007

Question

Three points A(1, 1), B(2, 2), C(3, 3) are:
  1. A
    Collinear
    Correct
  2. B
    Vertices of a triangle
  3. C
    Form a right angle
  4. D
    Non-collinear

Correct answer

Collinear

Explanation

Slope AB = (2−1)/(2−1) = 1. Slope BC = (3−2)/(3−2) = 1. Equal slopes and common point → collinear.