Describing Domain and Range

To find the $x$-coordinate of a point, we move vertically until we hit the $x$-axis. Similarly, to find the $y$-coordinate, we move horizontally until we hit the $y$-axis.

Now let's list the ordered pairs that we found. $$\begin{array}{c}(\text{-}3,5),(\text{-}1,5),(1,5),(3,5)\end{array}$$ The domain of a function is found by listing the relation's $x$-values. The range is found by listing the relation's $y$-values. $$\begin{array}{rl}D\text{: }& \{\text{-}3,\text{-}1,1,3\}\\ R\text{: }& \{5\}\end{array}$$