Which are examples of variables?
A. x, y, ac
B. 4+6-2 = 8
C. 3, 6, 9, 12
D. +, -, ·, ÷

Create a question with this scenario you could ask that could be answered only by graphing or using logarithm. 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.