Identify the correct condition for two non-vertical straight lines with slopes and to…

MATHEMATICS · Single correct · A Level · Mathematics · Coordinate geometry in the (x y) plane · Coordinate geometry in the (x y) plane

Problem

Identify the correct condition for two non-vertical straight lines with slopes m1m_1 and m2m_2 to be perpendicular. (a) m1+m2=0m_1 + m_2 = 0 (b) m1m2=−1m_1m_2 = -1 (c) m1m2=1m_1m_2 = 1 (d) m1m2=0m_1m_2 = 0

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