This game is a favorite staple in my classroom. I love it because it's quick (appx 10 minutes) and easy to incorporate into lots of topics, and the kids love it because it's competitive and fast paced.
Students are presented with a graph, table, description, equation, or scenario, and must identify if the function is direct or inverse before their partner does. The file includes 14 questions (+1 practice round), a mix of both types of variation.
All problems are included in the pdf preview, so you can see what is included. The powerpoint you purchase is fully editable, so you can add/change/remove slides to align with what you are teaching, or choose to use it as is.