Dave receives a salary of $200 a week plus a commission of 10% of his weekly sales. an equation y=mx+b represents dave’s weekly earnings. the y-intercept is dave’s base salary. the slope of the line is his commission. write an equation representing dave’s weekly earnings.

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.