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
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
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