please help!

The Indianapolis 500 is one of the most exciting events in sports. Each spring, 33 drivers compete in the 500-mile race, sometimes hitting speeds of more than 220 miles an hour. Cars may accelerate to pass each other. Acceleration is measured in feet/seconds2, read "feet per seconds squared."

Write a rational function that can be used to model the race, where the independent variable, r, represents the average speed in miles per hour and the dependent variable, t, represents the time in hours it takes to complete the race. How do r and t vary with each other?

Question

please help!

The Indianapolis 500 is one of the most exciting events in sports. Each spring, 33 drivers compete in the 500-mile race, sometimes hitting speeds of more than 220 miles an hour. Cars may accelerate to pass each other. Acceleration is measured in feet/seconds2, read "feet per seconds squared."

Write a rational function that can be used to model the race, where the independent variable, r, represents the average speed in miles per hour and the dependent variable, t, represents the time in hours it takes to complete the race. How do r and t vary with each other?