A car's fuel efficiency is modeled by the function , where is the fuel efficiency in miles per gallon (MPG) and is the speed of the car in miles per hour (MPH). What does the statement mean in this context?
The car travels 40 miles in 42 hours.
The car's fuel efficiency is 40 MPG when traveling at 42 MPH.
The car's fuel efficiency is 42 MPG when traveling at 40 MPH.
The car consumes 42 gallons of fuel to travel 40 miles.
