# Openstax Calculus Volume I| Functions and Graphs| Review of Functions | Problem 1

### For the following exercises, (a) determine the domain and the range of each relation, and (b) state whether the relation is a function.

 x -3 -2 -1 0 1 2 3 y 9 4 1 0 1 4 9

SOLUTION:

The domain is $\left\{-3,\:-2,\:-1,\:0,\:1,\:2,\:3\right\}$.

The range is $\left\{0,\:1,\:4,\:9\right\}$.

Since there is exactly one output for every input, then it is a function.