Question

keenan is a sprinter on his schools track team. during a race, his breathing rate increases until it is much higher than his resting breathing rate. his breathing rate remains elevated until the race is over. once the race is finished, keenans breathing rate gradually returns to normal. which graph could show keenans breathing rate during and after a race? two graphs are shown with breathing rate (breaths per min.) on the y - axis and time (sec.) on the x - axis. the first graph has a line that rises steeply then falls steadily. the second graph has a line that rises steeply, plateaus, then falls steeply.

Explanation:

Step1: Analyze the breathing rate trend

During the race, Keenan's breathing rate increases until the race is over (so there should be a period where the rate is elevated and constant during the race). After the race, it gradually returns to normal (decreases over time).

Step2: Compare with the graphs

• The left graph: After the initial increase, the breathing rate immediately starts decreasing, which doesn't match the description (it should remain elevated during the race).
• The right graph: It has a phase where the breathing rate is elevated (constant) during the race, then decreases after the race, which matches the description.

Answer:

The graph on the Right