If the points (2,3), (5,k) and (8,9) are collinear, then k equals:
If the points (2,3), (5,k) and (8,9) are collinear, then k equals:
- A. 4
- B. 5
- C. 6
- D. 7
Answer: C) 6
Explanation: Collinear ⇒ equal slopes: (k−3)/(5−2) = (9−3)/(8−2) = 1, so k − 3 = 3 and k = 6.
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