What is a Quadratic Function?

This is an introductory video on how to identify a quadratic function. This video explains what a quadratic function is and what the graph of a quadratic function looks like. The instructor goes through four examples of quadratic functions and four non-examples of quadratic functions in order to clarify the requirements for a quadratic function. A good video for learners who are confused about quadratic functions or just learning how to identify them.