This ready to use product is a quick, fun way to have your students practice identifying functions. Students will be given 20 different relations (graphs, mapping diagrams, tables, ordered pairs) and will need to classify it as a function or a non-function. Instead of writing their answers, students will color them! You can either choose the colors for them to make it unified across the classroom or let them choose their own. This is an extremely easy assignment to grade! It is perfect for guided practice, homework, or re-teaching.