Find the equation of the line through point (−1,2) ( − 1 , 2 ) and perpendicular to +3=3 x + 3 y = 3 . Use a forward slash (i. e. "/") for fractions (e. g. 1/2 for 12 1 2 ).

Idon’t know the answer to this but i did find a link that might you with this click this if you want really bad.

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