Nina makes and sells necklaces. For n necklaces, her revenue function is r(n) = 11.75n and her cost function is c(n) = 8.9 + 1.2n.
Which function is Nina’s profit function?

p(n) = 10.55n – 8.9
p(n) = 12.95n – 8.9
p(n) = 12.95n + 8.9
p(n) = 14.1n + 8.9

Question

Nina makes and sells necklaces. For n necklaces, her revenue function is r(n) = 11.75n and her cost function is c(n) = 8.9 + 1.2n.
Which function is Nina’s profit function? 

       p(n) = 10.55n – 8.9 
       p(n) = 12.95n – 8.9
       p(n) = 12.95n + 8.9
       p(n) = 14.1n + 8.9

anonymous · Answer

revenue-cost=profit
11.75n-(8.9+1.2n)=10.55n-8.9=A