Desmos has many additional audio features built in for screen readers. If you are using a screen reader and turn on the Audio Trace (Alt-T) then Desmos gives additional instructions solely for students who use screen readers. There are a wide variety of audio features, like a spoken summary of the graph, the ability to hear points and coordinates read aloud and also important characteristics of the intersection of graphs. You can find more information at the Desmos Accessibility site: https://www.desmos.com/accessibility