Answer:
miles per minute
Step-by-step explanation:
The formula to calculate average speed is:
![s=\frac{d}{t}](https://tex.z-dn.net/?f=s%3D%5Cfrac%7Bd%7D%7Bt%7D)
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://tex.z-dn.net/?f=D%3DYmiles)
and she traveled that distance is 37 minutes, so the time is:
![t=37min](https://tex.z-dn.net/?f=t%3D37min)
and substituting this into the average speed equation:
![s=\frac{Ymiles}{37minutes} \\\\s=\frac{Y}{37}mi/min](https://tex.z-dn.net/?f=s%3D%5Cfrac%7BYmiles%7D%7B37minutes%7D%20%5C%5C%5C%5Cs%3D%5Cfrac%7BY%7D%7B37%7Dmi%2Fmin)
the average speesdis
miles per minute (mi/min)