# Chapter 5 - Linear Functions - 5-6 Parallel and Perpendicular Lines - Lesson Check - Page 330: 4

a) yes b) no c) no

#### Work Step by Step

a) $-2 * 1/2 = -1$ The product is -1, so the numbers are opposite reciprocals. b) $1/4 * 4 = 1$ The product is 1, so the numbers are not opposite reciprocals. c) $5 * -5 = -25$ The product is -25, so the numbers are not opposite reciprocals.

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