Question: If three distinct points A, B, and C in a plane are such that the slopes of nonvertical line segments AB, AC, and BC are

If three distinct points A, B, and C in a plane are such that the slopes of nonvertical line segments AB, AC, and BC are equal, then A, B, and C are collinear. Otherwise, they are not. Use this fact to determine whether the three points given are collinear.

(0, 9), (-3, -7), (2, 19)

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