## College Algebra (10th Edition)

Published by Pearson

# Chapter 3 - Section 3.1 - Functions - 3.1 Assess Your Understanding - Page 211: 22

domain: $\left\{\text{Less then 9th grade, 9th-12th grade, High School Graduate,} \\\text{Some College, College Graduate}\right\}$ range: $\left\{\text{\$18,120, \$23,251, \$36,055, \$45,810, \$67,165}\right\}$The relation is a function. #### Work Step by Step The domain is the set of the first coordinates while the range is the set of second coordinates. Thus, the given relation has: domain:$\left\{\text{Less than 9th grade, 9th-12th grade, High School Graduate,} \\\text{ Some College, College Graduate}\right\}$range:$\left\{\text{\$18,120, \$23,251, \$36,055, \$45,810, \$67,165}\right\}$ Every first element is paired/mapped with only one second element so the relation is a function.

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