Modifica i valori dei coefficienti a b e c e visualizza come cambia la retta rappresentata dall'equazione cartesiana ax+by+c=0.
[list] [*]Che caratteristica hanno (in termini dei coefficienti a, b e c) le rette parallele all’asse x? _____________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________ [*] e quelle parallele all’asse y? _____________________________________________________________________________ __________________________________________________________________________________________________________________________________________________________ [*] Che caratteristica hanno le rette passanti dall’origine degli assi? _____________________________________________________________________________ _______________________________________________________________________________________________________________________________ [/list]