As the number of computers manufactured increases, Stella's monthly average cost of manufacturing a computer : a) decreases b)also increases c)sometimes increases sometimes decreases d) stays the same

Stella is a computer manufacturer and she determines that her monthly average cost of manufacturing a computer is given by the function f (c) = 300* + 150 where c 10c+5 - represents the number of computers manufactured. (Note. that c in a nonnegative number)