# What is the domain and range of {(7,2) (8,2), (9,2), (10,2)?

May 3, 2017

See the solution explanation below:

#### Explanation:

In the set of ordered pairs {(-2, 0), (0, 6), (2, 12), (4, 18)}, the domain is the set of the first number in every pair (those are the x-coordinates): {-2, 0, 2, 4}. The range is the set of the second number of all the pairs (those are the y-coordinates): {0, 6, 12, 18}. This table describes y as a function of x.

Therefore, for this problem:

The domain is $\left\{7 , 8 , 9 , 10\right\}$

The range is $\left\{2\right\}$