# Chapter 3 - Section 3.1 - Functions - 3.1 Assess Your Understanding - Page 211: 21

domain: $\left\{\text{20 hours, 30 hours, 40 hours}\right\}$ range: $\left\{\text{\$200, \$300, \$350, \$425}\right\}$

#### 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: $\left\{\text{20 hours, 30 hours, 40 hours}\right\}$ range: $\left\{\text{\$200, \$300, \$350, \$425}\right\}$ This relation is not a function.

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