How to define X and Y on this calculator (Casio fx-220 PLUS 2nd edition)? I can't figure it out since manual for this is for a few models and it doesn't tell
Amazon.com: Casio fx-9750GII Graphing Calculator, Blue : Everything Else
calcolatrice originale nuova casio fx-220 plus - Vinted
CALCOLATRICE CASIO FX-350EX - Fiscal Point - Cartoleria, Informatica e Ufficio