Question

The cost for an upcoming field trip is $30 per student. The cost of the field trip, is dollars, is a function of the number of students x.

Select ALL the possible inputs (domain) for the function defined by C(x)=30x
where x is number of students attending the field trip.

(1 point)
Responses

14 3/4
14 3/4

22
22

15
15

4.5
4.5

45
45
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Answer 1

The domain must be whole (nonnegative) numbers of students — no fractions or decimals. So the valid inputs from the list are: 22, 15, and 45.