The cash register deduct $2.50 from a $25 Coffee Cafe gift card for every medium coffee to customer Buys in an equation is written to calculate the total number on the gift card what is the meaning of the Y intercept in the equation

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.