What is the input value for the following function if the output value is 4.5?
y =

2.25
6.5
8
9

Tha answers are c. 2 and d. 7.5 ; )

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

C+19÷-17=17c+(-1.11764706)=17c=.11764706)c=18.1176471