The table shows data collected to represent the functional relationship between the number of people attending a wedding and the cost of the wedding. People, x Cost ($), y 5 445 10 890 15 1,335 20 1,780 25 2,225 What is the domain of the function represented by the table?

The domain is the set of input values, which are the numbers of people listed in the table. Those values are 5, 10, 15, 20, and 25, so the domain is {5, 10, 15, 20, 25}. The choices that include all nonnegative integers or all real numbers include values that are not shown in this table.

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