Understanding Function Notation f(x)

I define Function Notation and then work through 3 examples. Example 1 is a word problem where we write a function that models the real world setting and then use it to evaluate a total cost at 6:55 Example 2 and Example 3 are substituting either a value or an expression into a function an then simplifying to a final answer at 16:37 and 23:07 More about Functions vs Relations at http://youtu.be/oFwRPH0JrFY More about graphing lines in the form of y=mx+b at https://www.youtube.com/watch?v=xyVJZKu7Euw Find free review test, useful notes and more at http://www.mathplane.com