Functions

1. One-to-one functions

1.1. Inverse Functions

1.2. New node

2. Composite Functions

2.1. Domain Restrictions?

2.2. http://www.youtube.com/watch?v=S4AEZElTPDo

3. Operations on Functions

3.1. Addition

3.2. Subtraction

3.3. Multiplication

3.4. Division

4. Vertical Line Test

4.1. Domain?