## Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson

# Chapter F - Foundations: A Prelude to Functions - Section F.3 Lines - F.3 Assess Your Understanding - Page 29: 7

#### Answer

$...\underline{\text{their slopes are equal}}$ and $\underline{\text{their y-intercepts}}$ are unequal; $...\underline{\text{their slopes have a product of -1}}$.

#### Work Step by Step

The lines are parallel if their slopes are equal and the y-intercepts are unequal; the lines are perpendicular if their slopes have a product of $-1$.

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