Which pair of straight lines is perpendicular?

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

Problem

Which pair of straight lines is perpendicular? (a) y=2x+3 and y=12x−5y = 2x + 3 \text{ and } y = \dfrac{1}{2}x - 5 (b) y=4 and x=−2y = 4 \text{ and } x = -2 (c) y=4 and y=−3y = 4 \text{ and } y = -3 (d) y=−2x+5 and y=−12x−4y = -2x + 5 \text{ and } y = -\dfrac{1}{2}x - 4

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