Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s). When renting a car, the cost per mile is inversely proportional to the number of miles driven. At Zippy Car Rentals, if the standard model car is driven for 300 miles, then the cost per mile is $0.25.

At Zippy Car Rentals, the constant of variation is
for a standard car rental. If that rental car is driven for 375 miles, then the cost per mile is $