I posted this in a different forum so if you are seeing it for the second time I apologize, someone suggested I post it here as well.
I would like to prompt, input, request (or whatever) a function, store it as y1(x) (doesn't have to be y1(x) could be a(x) or anything else) and use the function later in a program. Here is an example although it clearly does not work.
The program will use two variables at most so no need to start using matrices. Any suggestions appreciated, I am fairly new to TI Basic so you might have to walk me though!