<PRE><B>Question 778773</B>
Johnny bought a $30 ticket book for a local amusement park. Each ride at the park cost $1.50. What is the independent and dependent variables. Also write a function that represents the remaining dollar amount D(r) left after each ride. 
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V(x) = 30 - 1.50x
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Independent variable: # of rides
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Dependent variable: Value of the ticket book after x rides.
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Cheers,
Stan H.
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