Suppose the function f(x) = 2x + 12
represents the cost to rent x movies a
month from an internet movie club. Casey
now has $10. How much more money does
she need to rent 7 movies next month?
First figure out how much it costs to rent seven movies a month. f(7)=2(7) + 12–> 14 + 12–> $26 Now we need to find the difference between 26 and 10. 26 - 10= 16. So Casey needs $16 more to rent 7 movies a month
