# What is the domain and range of {(4,2),(-3,2),(8,2),(8,9),(7,5)}?

Aug 2, 2018

Domain: $\left\{- 3 , 4 , 7 , 8\right\}$

Range: $\left\{2 , 5 , 9\right\}$

#### Explanation:

The domain is also known as the $x$-values and range is the $y$-values.

Since we know that a coordinate is written in the form $\left(x , y\right)$, all the $x$-values are:
$\left\{4 , - 3 , 7 , 7 , 8\right\}$

However, when we write a domain, we typically put them from least to greatest and not repeat numbers. Therefore, the domain is:
$\left\{- 3 , 4 , 7 , 8\right\}$

All the $y$-values are:
$\left\{2 , 2 , 2 , 9 , 5\right\}$

Again, put them in least to greatest and do not repeat numbers:
$\left\{2 , 5 , 9\right\}$

Hope this helps!