# Chapter 1 - Functions and Their Graphs - Section 1.1 Functions - 1.1 Assess Your Understanding - Page 53: 15

$\text{The relation represents a function.}$ $\text{Domain: \{Elvis, Colleen, Kaleigh, Marissa}\}$ $\text{Range: \{Jan. 8, Mar. 15, Sept. 17} \}$

#### Work Step by Step

This relation is a function because each element in the domain corresponds to exactly one element in the range. $\text{The domain (set of all first coordinates) of the function is } \{\text{Elvis, Colleen, Kaleigh, Marissa}\}$ $\text{The range (set of all second coordinates) of the function is } \{\text{Jan. 8, Mar. 15, Sept. 17} \}$

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