SOLUTION: Justin's graduation picnic costs $7 for every attendee. Is the total cost directly proportional to the number of attendees?

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Question 1128447: Justin's graduation picnic costs $7 for every attendee. Is the total cost directly proportional to the number of attendees?
Answer by ikleyn(52814) About Me  (Show Source):
You can put this solution on YOUR website!
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If these is no "hidden" fee, the answer is "YES".