9514 1404 393
Answer:
yes
yes
Step-by-step explanation:
The domain of the function is the number of friends and family for which you buy birthday cards. The question is equivalent to asking, "is it reasonable that you would buy birthday cards for 8 members of friends and family?"
Yes, I believe that 8 is reasonably in the domain.
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The range of the function is the set of possible values the function may have. Here, those would correspond to integer values of x. That is, range values will be whole number multiples of 2.5. 40 is one such multiple:
2.5(16) = 40
If you buy birthday cards for 16 members of friends and family, your cost will be $40. Yes, I believe 40 is reasonably in the range.
