Write a Cost Function for the Problem $C(x)=60 x+45$

Multiple Choice

Write a cost function for the problem. Assume that the relationship is linear.
-An electrician charges a fee of $60 plus $45 per hour. Let C(x) be the cost in dollars of using the electricia

A) $C(x) =60 x+45$
B) $C(x) =45 x+60$
C) $C(x) =60 x-45$
D) $C(x) =45 x-60$ n for x hours.