After Exercising for a Few Minutes,a Person Has a Respiratory $v = 1.75 \sin \left( \frac { \pi t } { 3 } \right)$

question 10

Multiple Choice

After exercising for a few minutes,a person has a respiratory cycle for which the velocity of airflow is approximated by​ $v = 1.75 \sin \left( \frac { \pi t } { 3 } \right)$ , ​
Where t is the time (in seconds) .
(Inhalation occurs when v > 0 and exhalation occurs when v < 0. )
Select the graph of this velocity function.

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