First slide

Equation of line in Straight lines

Question

The points (k – 1, k + 2), (k, k + 1), (k + 1, k) are collinear for

Moderate

A

any value of k
B

k = – 1/2 only
C

no value of k
D

integral values of k only

Solution

Slope of the line joining any two points is independent of k

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