This is a PowerPoint lesson and notetaking guide that discusses how to identify functions. It looks at ordered pairs to identify whether the domain repeats and practices the vertical line test. Solving equations in function notation is also included. I use the PowerPoint on my smartboard and upload it to goggle classroom for students if they need extra help or if they were absent for the day. You will find that as you go through the PowerPoint, students can take notes on their note page which we put into our math interactive notebooks. The PowerPoint is editable and has 17 slides.