Question

Joey is driving his car at a constant speed. The graph below represents the distance he traveled with respect to time.

What is the rate of change of the graph?

A.40 miles per hour
B.50 miles per hour
C.25 miles per hour
D.75 miles per hour

Answer 1

Even though you cut a digit off of the y-axis labels, and didn't label the too y-value at all, you can't fool us. We're too smart.

Joey covered 250 miles in 5 hours. So the rate of change of the graph is 50 miles/hour. The points on the line at each half-hour confirm it.

Answer 2

He is driving at 50 miles per hour, which is answer B.