Um so i need help this is due today and i dont know the anwser

Its d so thats how it would would back from 1.0 form three four two

Does the problem say y=x+4?

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho