Question

Mickey is traveling at a constant speed on his bicycle. The graph shows how d, the total distance traveled, depends on t, the time in hours.

The graph titled Bike Trip reading shows distance traveled in miles on the vertical axis labeled d and time in hours on the horizontal axis labeled t. A line passing through (0, 0) and (1, 12), is shown.

What can be concluded from the information on the graph?

A.
Mickey is riding at a speed of 11 miles per hour.

B.
Mickey rode a total of 12 miles.

C.
Mickey rode a total of 11 miles.

D.
Mickey is riding at a speed of 12 miles per hour.

Answer 1

D. The slope is (12 − 0)/(1 − 0) = 12 miles per hour, so his constant speed is 12 mph.