The y axis represents the distance Gil is from home so if the y axis increases this means he is moving farther away from his home. The x axis represents the time which is always moving forward.
The time between 21 and 30 minutes clearly has the y axis increasing so the Gil's distance from home is indeed increasing.
While both a and c work the most likely answer that they want would be A because it represent the cents already and it shows all possible ways that those two values can be split among 1 dollar
