Find the Appropriate Linear Cost or Revenue Function $\$ 27$ For the Basic Service Plus

Multiple Choice

Find the appropriate linear cost or revenue function.
-A cable TV company charges $\$ 27$ for the basic service plus $\$ 6$ for each movie channel. Let $C(x)$ be the total cost in dollars of subscribing to cable TV, using $x$ movie channels. Find the linear cost function.

A) $C(x) =27 x+6$
B) $C(x) =6 x+27$
C) $C(x) =6 x-27$
D) $C(x) =27 x-6$