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) a 40 b 80 c 1 over 40 d 1 over 80