The graph below shows your speed at different times while riding a bicycle.

Question

A coordinate graph is shown. Horizontal axis is labeled Time from the Start in minutes. Vertical axis is labeled Speed in kilometers per hour.
The first line segment starts at 0 comma 5 and ends at 4 comma 9.
The second line segment starts at 4 comma 9 and ends at 7 comma 7.
The third line segment starts at 7 comma 7 and ends at 10 comma 7.

For how many minutes did your speed remain constant?
A. 3
B. 4
C. 7
D. 10

Answer 1

Your speed remained constant for 4 minutes between 4 and 7 on the horizontal axis. Therefore, the answer is B. 4.