On Friday, Jade washed 10 vehicles in 4 hours. The next day She washed 15 vehicles in 6 hours. Is the number of vehicles she washed proportional to the time it took her to wash them? Explain.
To find out how many cars she washes per hour, take the number of cars, and divide that by the number of hours it takes her 10 cars divided by 4 hours=2.5 cars per hour
15 cars divided by 6 hours=2.5 cars per hour
So your answer would be yes, as she took the same number of cars per hour