Marco needs to buy some cat food. At the nearest store, 5 bags of cat food cost $28.75. How much would Marco spend on 6 bags of cat food?
Marco would spend $on 6 bags of cat food.

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.