JEE Main 2019 Mathematics question
Suppose that the points (h, k), (1, 2) and (−3, 4) lie on the line . If a line passing through the points (h, k) and (4, 3) is perpendicular to , then equals:
Answer: (B)
Solution
Slope of = −1/2, so has slope 2; solving gives (h, k) = (3, 1).