Patrick B. answered • 07/25/19

Math and computer tutor/teacher

She travels 45 mph for 30 minutes = 1/2 hour

Distance = rate * time

= 45 mph * 1/2 hour

= 22.5 miles

Distance/rate = time

So the function is Time T(s) = 22.5/s where s is the speed in miles per hour.

It is a continuous function with domain and range of real numbers. It is possible

that she can drive a fractional value, as is the time.

Ex. If she drives 50.5 mph, then it will take her 22.5/50.5 = 0.__4455__ hours = 26 minutes and 44 seconds