Math 10C: Functions

Note: at 15:38, the final answer should be 11 - 5 times the square root of 3.
How are functions similar to and different from relations?
1. Introduction - what is a function? 00:04
2. Vertical line test: 03:59
3. Determine which relations (table of values, graphs, ordered pairs) are functions: 05:38
4. Function notation: 08:19
5. Examples: 08:59