A square has a vertex at (-15,-9) and is dilated at the origin with a scale factor of 1/3. What is the new coordinate of the vertex? A. (-5, -3)
B. (5,3)
C. (-3,-5)
D. (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.