Functions serve as the cornerstone of this course. In this 7 lesson unit, the basic notion of a function is introduced in algebraic, graphical, and tabular forms. Various functions and modeling problems are explored and the concepts of domain and range are introduced. Finally, the average rate of change is introduced as a way to measure how quickly functions change over parts of their domain.To access the lesson videos on YouTube use your smartphone or tablet to scan the QR code at the top of ea