The product of speed and time represents distance. If r is the speed, t is the time, and d is the distance, then d = rt 1. You and your parents are travelling in your own car for 150 kilometers. a. How long will the trip last if you average 45kph, 60kph, or 90kph? b. Write a function that describes the time it takes to make the trip as a function of your speed. c. Graph the function. 45kph r t Write your solution here: 60kph 90kph Graph here​