Given the relation described, identify the input and the output.
1. Fred wants to know his weekly salary when he works for a certain number of hours per week at a constant hourly pay rate. 2. In an experiment, Josie wants to find out how the length of a shadow changes during different times of the day.
3. Mr. Warren wants to know how many miles he can drive his car for various gallons of gasoline in his car’s fuel tank.