# Chapter 1 - Section 1.2 - Basics of Functions and Their Graphs - Exercise Set - Page 176: 10

The given relation is a function. Domain: $\left\{4, 5, 6\right\}$ Range: $\left\{1\right\}$

#### Work Step by Step

RECALL: (i) A function is a relation where every first coordinate is paired with exactly one second coordinate. (ii) The domain of a relation is a set that contains all the first coordinates. (iii) The range of a relation is a set that contains all the second coordinates. Note that each first coordinate of the relation is paired with only one second coordinate. Thus, the given relation is a function. The domain of the relation is $\left\{4, 5, 6\right\}$. The range of the relation is $\left\{1\right\}$.

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