This video is a step by step lesson for both teachers and students. Teachers can show this video to their students as a lecture, or use if for their own lesson. This video provides content on understanding functions and identifying the domain and range. It is useful for anyone interested in learning how to solve equations. Parent may want to use this video to help their children learn the content. This video is excellent for Home School teachers to deliver as content. It also provides a free pdf to be given to students as notes to study.