When a car makes an emergency stop on dry road, it leaves skid marks. The speed S, in miles per hour, of the car when brakes were applied is related to the length L, in feet, of the skid mark.

Functional notation is needed, please help.

3 answers

Draw a circle' show its centre'radius'diameter and chord artistic way
Since this is not my area of expertise, I searched Google under the key words "auto braking distance" to get these possible sources:

https://www.google.com/search?client=safari&rls=en&q=auto+braking+distance&ie=UTF-8&oe=UTF-8&gws_rd=ssl

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
Draw a circle' show its centre'radius'diameter and chord artistic way