Chang-ho is going on a trip to visit some friends from summer camp.

Chang-Ho is going on a trip to visit some friends from summer camp. He will use $40 for food and entertainment. He 

will also need money to cover the cost of gas. The price of gas at the time of his trip is $3.25 per gallon.

1.) Consider a function in the form C(g) to represent this problem situation.

a.) Write a function to represent the total cost of the trip as a function of the number of gallons used.

b.) Identify the independent and dependent quantities and their units.

c.) Identify the rate of change and the y-intercept. Explain their meanings in terms of the problem situation.