The equation R(v) =5800 / v can be used to determine the heart rate, R, of a person whose heart pumps 800 milliliters (mL) of blood per minute and v milliliters of blood per beat.
![1666_heart rate.jpg](https://secure.tutorsglobe.com/CMSImages/1666_heart%20rate.jpg)
Find the rate of change of heart rate with respect to v, the output per beat.