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An outdoor swimming pool costs $8 per day to visit during the summer.there is also $25 yearly registration fee.is the total cost proportional to the total number of days visited

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belle105
No,,The equation of cost includes the flat fee. This fees makes it so the cost is not proportional to the number of days visited.
cost= 25 + 8d
To be proportional you'd have to have no flat fee:
cost= 8d
1 day = $8
2 days = $16
5 days = $40
10 days = $80, etc.

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