Which graph could represent the price of a fence selling at a unit rate of r dollars per foot?

Add 1/7 + -1/7 your answer should be reduced to its smallest form and should not be an improper fraction

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 you divide 25 into 4 equal groups? explain why or why not.