Suppose that you have at your disposal the information below for each of 30 drivers. Propose a model (including a very brief indication of symbols used to represent independent variables) to explain how miles per gallon vary from driver to driver on the basis of the factors measured. Information:

1. miles driven per day

2. weight of car 

3. number of cylinders in car 

4. average speed 

5. miles per gallon

6. number of passengers