Have you ever wondered about functions? What makes a function a function? Why is it different than a relation? Functions hold a special place in mathematics, in that they describe the dependencies between values, inputs and outputs, ingredients and baking. What ingredients we put into a cake mix depends on the type of cake we desire. Similarly, a function can be describe (loosely) as a recipe, what you put into the recipe determines what your result will be.
To gain a bit better understanding of how functions are determined and defined, watch the following three videos. Take notes as you watch, particularly about ideas or concepts that might be new or you still have questions about.
(If you are really interested, notice along the left menu bar there are more videos about functions you can can watch!)
Once you are done watching the videos, go on to the next part of the lesson.