Answer:
The answer is 4:480, with the number of hours traveled as the first value, and the second value being the number of miles traveled. If you want to simplify the ratio, divide both sides by 4 to get 1:120, meaning for every hour she traveled, she traveled 120 miles.
Explanation:
To find out how many hours she traveled, count from the time she left to Chicago, until the time she arrived at her destination. 9:30 AM to 1:30 PM is a total of 4 hours. The amount of miles is already given in the question, which is 480. Meaning the ratio of hours traveled to miles traveled is 4:480. To find out how many miles she traveled for every hour, all we have to do is divide the hours traveled to the miles traveled. Then divide the hours traveled to itself. We then have 1:120.