### 4.8: Implicit Differentiation

Read Section 4.8 (pages 87-90). As a result of the chain rule, we have a method for computing derivatives of curves which are not explicitly described by a function. This method, called implicit differentiation, allows us to find tangent lines to such curves.

Watch this video.

Work through problems 1-9 and 11-16 for Exercise 4.8. When you are done, check your answers against Appendix A.