Question

Which function represents the cost of a pizza with n Toppings

Answer 1

Correct answer is B... You can plug in values for n.  Plug in 1 for n and the out put is 12.  Plug in 2 for n and the output is 13.5

Answer 2

15 - 13.50 = 1.50

So each extra topping after the 1st is 1.50

C(n) = 12+ (n-1) 1.5

we use n-1 since the 1st topping is included in the 12 dollar price.

Choice B