Evaluate. (- 1/2 + 3/4 )
1/5
a) -1 1/4
b) - 5/8
c) 1 1/4
d) 5/8

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.