Q. 8
If points (1, 2), (–1, x) and (2, 3) are collinear, then the value of x will be:
A. 2
B. 0
C. –1
D. 1
Answer :
Given, points A (1, 2), B (–1, x) and C (2, 3) are collinear.
⇒ Slope of AB = Slope of AC
∴ x – 2 = –2 (1)
∴ x = 0.
∴ The correct option is B.
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If points (1, 2), (–1, x) and (2, 3) are collinear, then the value of x will be:
Rajasthan Board Mathematics