Write the rule for the following arithmetic sequence:
14, 9, 4, -

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.

Can someone answer this question for me

Y+ 2/y is it a polynomial in one variable or not? and if so, why?