Straight Line Question 28

Question: If the line passing through (4, 3) and (2, k) is perpendicular to $ y=2x+3 $ , then k = [RPET 1985; MP PET 1999]

Options:

A) -1

B) 1

C) 4

D) 4

Show Answer

Answer:

Correct Answer: D

Solution:

  • $ ( \frac{k-3}{2-4} )(2)=-1\Rightarrow 2k-6=2\Rightarrow k=4 $ .