The Workers company manufactures hammers. The production facility has fixed costs of 400 dollars a day and the cost of making one hammer is $4.75. Which of the following equations represents the daily production cost based on the number of hammers manufactured each day?
(C(x) represents the daily production cost, which is a linear function of x, the number of hammers manufactured)
a) C(x) = 4.75x - 400
b) C(x) = 400x + 4.75
c) C(x) = 4.75x + 4.75(400)
d) C(x) = 4.75x + 400