Hey I think the answer to your problem is eighter c or d! I think the real answer is: biker 1 travels 40 miles in 4 hours from the graph so it travels 10 miles per hour and 30 miles for 3 hours. biker 2 travels 45 miles in 5 hours from the graph so it travels 9 miles per hour and 27 miles for 3 hours. Therefore, third biker is slower than both of them. it is A.