Does the equation represent a direct variation if so find the constant variation
5x=-3y

A. No
B. Yes k=-5/3
C. Yes k=5/3
D. Yes k= -3/5

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.