Two lines are perpendicular

MATHEMATICS · Single correct · AoPS · Mathematics · Lines Graphing · Lines Graphing

Problem

Two lines are perpendicular. If the slope of the first line is 45\dfrac{4}{5}, what is the slope of the second line? (a) −45-\dfrac{4}{5} (b) −54-\dfrac{5}{4} (c) 54\dfrac{5}{4} (d) −1-1

Related theory

Browse the problem library