During peak hours, a car wash washes an average of 2 cars every 3 minutes. A graph of the cars washed in 30 minutes shows the time on the x-axis and the total cars washed on the y-axis. The x-axis on the graph is in 3 minute intervals. Write the set of ordered pairs that represents the number of cars washed after each interval. How many cars will be washed in 2 hours?
