Answer:
Domain
Step-by-step explanation:
The domain tells you all of the possible x-values in a set of data.
The example uses ordered pairs written as (x, y), and takes out all of the x-values. It wrote the domain in set notation (which is when the { } curly-styled parentheses are used).
Do not confuse domain with range. Range means all of the y-values in a relation.
In the provided example, the range would be {3, 4, 5, 7}.
