I have this link for several versions of the TI graphing calculators. You can download it and use it on your computer. I thought you guys might find it useful. They’re expensive (although purchasing a graphing calculator is a worthwhile investment).
this is what it looks like:
This is the downloadable desktop version, but there is also an app called “wabitemu”
You need to download both. So download both.
Here is an instructional video