Before we look at the given table, let's recall the definitions of discrete and continuous.
Discrete Domain: A set of input values that consist of only certain numbers in an interval.
Continuous Domain: A set of input values that consist of all possible numbers in an interval.
In the given situation, the input is the number of hats. It is only possible to have integers for the number of hats, as we cannot buy part of a hat. Therefore, the domain is discrete.
