The license fee for a car varies directly with the value of the car. The fee for a car that is valued at $19,500 is $292.50. a) What is the constant of proportionality? b) Write the equation that shows the license fee as a function of the value of the car. c) If you were to draw the graph of this function, what would be the slope of the line? d) If you were to draw the graph of this function, what would be the y-intercept? e) At this rate, what is the license fee for a car that is valued at $25,400?