A reporter collected data on y the current market value, in dollars, of a certain car for various years, x, after it had been purchased new. The equation below was fit to the data.

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