I’ve mentioned the ice cabinets at this chain of convenience stores before. They provide some nice data points for a linear relationship. I finally built a short Desmos activity around the photos.
Even though the short activity could be polished, it has a couple of nice features on slide #3
- The user is prompted to enter an equation, and the function has already been started for you (like a sentence frame, but for math).
- When the user types in an equation, the equation is automatically displayed on the adjacent graph.