The points P(1,-2), Q(3,k) and R(7,8) are known to lie on the same straight road when…

MATHEMATICS · Single correct · CBSE · Mathematics · Straight Lines · Straight Lines

Problem

The points P(1,-2), Q(3,k) and R(7,8) are known to lie on the same straight road when plotted on the coordinate plane. Find the value of

k

. (a)

4

(b)

\dfrac{1}{2}

(c)

\dfrac{4}{3}

(d)

\dfrac{5}{3}