Linear/Non-Linear & Time - Invariant and Variant equation identifier

this is a school activity that we have submitted already... i hope this may help those that need to program the same thing.... time invariant has input delay (shift) waveform, and has an output with same delay (shift) but the waveform stays the same.... this concept was used to get the data for time invariant.... while linear and non linear, the concept of input, and same output...