If Jack walked 9 miles in 1 hour and 15 minutes, what was his rate of walking in miles per hour?
Pick.
A) 4
B) 4.5
C) 6
D) 6.25
E) 7.2

Rationale: "distance walked in 1 hour and 15 mins = 9 miles speed per hour = distance / time = 9 / ( 5 / 4 ) = 7.2 miles per hour answer e"
Answer: E