Consider the scenario below:

Helen is a painter. It takes her 3 days to make each painting. She has already made 6 paintings. Which of the following functions best models the number of paintings she will have after days?

The daily pay in U.S. Dollars for a certain job is defined as the following function , where equals time in hours:

If an employee works for 7 hours in a day, how much is he or she paid?