Understanding functions

The cost to manufacture x pairs of sunglasses can be represented by a function C(x).  If it costs $398 to manufacture 4 pairs of sunglasses, which of the following is true?
A.)  C(4) = 99.50
B.)  C(398) = 4
C.)  C(4) = 398
D.)  C(99.50) = 1

---

​Video Answer and Explanation:

Ask Algebra House