Thank you. That helps, although I can't see what my options are for the words following the uploaded data. (My original question was about syntax and available commands/expressions/functions.) I'll look for "time series" and see what related options I might have.
I'm a high school teacher, and I don't want to spend too much time teaching a programming language to the students. I want to take the data and process it, with a little more power than Desmos, a little more availability than the commands on a TI graphing calculator. I hope that makes sense.