The following is a quiz to test your ability to use concepts of differentiablity to infer
information about the graph of a function. Each problem consists of four parts. You
click on the boxes next to statements which you believe that are **always true**.
After you have chosen the answers for the four parts, then click on the button *Check
Answers*. You will then be told which answer is correct or not. Explanations are
given for wrong answers. There are a total of **15** problems; you will be given a
score at the end of the 15^{th} problem.

This page was originally written by Marek Szapiel.