Marcos traveled for 2 hours and 17 minutes on Interstate 17 as he drove (without stopping) a distance of 155 miles from Phoenix to Flagstaff. 0.5 0.5 1 1.5 2 2.5 40 80 120 160 -40 # of hours since Marcos left Phx # of miles Marcos traveled since Phx a. Marcos did not travel at a constant speed on this drive. Which graph could represent how Marcos' distance traveled (in miles) and the number of hours since he left Phoenix change together? Select an answer b. Determine Marcos' average speed for the 155 mile trip. miles per hour c. Devon also drove to Flagstaff, leaving at the same time and from the same location as Marcos, and arrives in Flagstaff at the same time. Devon has cruise control and travels at a constant speed for the entire trip. i. Which graph could represent the relationship between Devon's distance traveled (in miles) since leaving Phoenix and the number of hours elapsed since Devon left Phoenix? Select an answer ii. At what constant speed did Devon drive? miles per hour d. After driving for 2.2 hours (2 hours and 12 mintues), Marcos' total distance traveled was 153 miles. At what constant speed (in miles per hour) will Marcos need to travel for the last 5 minutes of the trip so that he travels the 155 mile drive in 2 hours and 17 minutes? miles per hour