Age of drivers in crash fatalities the number of crash fatalities per 100,000 vehicle miles of travel (based on 1994 data) is approximated by the model
![1961_343153a1-1c02-49c5-872f-48c8ef758b56.png](https://secure.tutorsglobe.com/CMSImages/1961_343153a1-1c02-49c5-872f-48c8ef758b56.png)
Where x is the age of the driver in years, with x = 0 corresponding to age 16. Show that f is decreasing on (0, 11) and interpret your result.