Below is a video that shows an overview about Polygraphs and how to create one. Matt Vaudrey, Ed/Tech Coach for Bonita Unified School Distrct, has created a template to organize the images for a polygraph. Click on this link to download the template.
Another activity that you can build with Desmos is Card Sorts. The students can work individually or in pairs to group sets of cards according to the instructions given. I created a card short with a graph, a range and a domain. The students enjoyed the practice assignment. Click on the link to view a card sort for English where the students group adjectives, nouns, verbs and adverbs and the other is a Chemistry card sort out the Periodic Table.