The graph shows the distance a car traveled, y, in x hours: A coordinate plane graph is shown. The x-axis is labeled time in hours, and the y-axis is labeled distance in miles. The line passes through the points 2 comma 80, and 3 comma 120.
What is the rise-over-run value for the relationship represented in the graph? (4 points)

1 over 80

1 over 40

80

40