This activity provides students with examples of linear and non-linear functions, presented in a variety of representations. Students use the examples to deduce the characteristics that distinguish linear from non-linear functions. This task can be used for introducing, reviewing, or assessing this concept. Students could complete this independently, but it was designed as a task for students to work through in a collaborative manner. It is designed to support Common Core standard 8.F.3. I have also shared this lesson from "Susan's Math Stuff" on the Better Lesson website and included it in my district's curriculum guide.