Megan is going on a long distance road trip. She drives for 20 miles before being able to travel at a constant speed using cruise control. The equation used to find her total distance traveled is shown below. y=60x+20

If y is the total number of miles driven, and x is the number of hours driven after reaching 20 miles, which statement best describes the rate of change in the distance traveled?

A.
For every hour, she will drive 80 miles.
B.
For every hour, she will drive 60 miles.
C.
For every 20 hours, she will drive 80 miles.
D.
For every two hours, she will drive 60 miles.