# What is the domain and range of {(3,7),(3,8),(3,-2),(3,4),(3,1)}?

Aug 10, 2015

Domain: $x = 3$
Range: $y \in \left\{7 , 8 , - 2 , 4 , 1\right\}$

#### Explanation:

Assuming the given set represents values of $\left(x , y\right)$ where $x$ is being mapped into $y$.

$\textcolor{w h i t e}{\text{XXXX}}$The domain is the set of all valid values for $x$.

$\textcolor{w h i t e}{\text{XXXX}}$The range is the set of all valid values for $y$

Note: This explicit set mapping is not a function (since the same value of $x$ maps into multiple values of $y$)