HC Math 30-2 Book 4 Sinusoidal Functions Page 22 When you exercise, the velocity of the air entering and exiting your lungs, measured in litres per second, changes in terms of time, measured in seconds. The following graph models the relationship between velocity and time for an adult who is exercising. Air Velocity during Exercise 1.21 0.8 0.4 Velocity (L/s) -0.8 -1.2 Time (s) d) According to this model, does an adult take more breaths per minute when exercising, or just deeper breaths, than an adult at rest? How do you know? e) What characteristic (period, equation of midline, or amplitude) of the second graph has changed, compared with the first graph? What is the maximum velocity of the air entering the lungs? Include the appropriate units of measure