Answer:
miles per minute
Explanation:
The formula to calculate average speed is:
![s=(d)/(t)](https://img.qammunity.org/2021/formulas/physics/college/x4v9v76tg3too281afd5tr59p2m29ftr3b.png)
where s is speed, d is distance, and t is time.
we know that she traveled 'Y' miles, so the distance is:
![D=Ymiles](https://img.qammunity.org/2021/formulas/mathematics/high-school/80qbkrngbx1fgh73svq2pak90ek42m9i2i.png)
and she traveled that distance is 37 minutes, so the time is:
![t=37min](https://img.qammunity.org/2021/formulas/mathematics/high-school/6da6noqehvxzgtncqq6lyslm38hq82f5qb.png)
and substituting this into the average speed equation:
![s=(Ymiles)/(37minutes) \\\\s=(Y)/(37)mi/min](https://img.qammunity.org/2021/formulas/mathematics/high-school/4qrqv1ndh9u39trav544gqvr3s4pwcz22n.png)
the average speesdis
miles per minute (mi/min)