A set of weights includes a 4 lb. barbell and 6 pairs of weight plates. Each pair of plates weighs 20 lb. If x pairs of plates are added to the barbell, the total weight of the barbell and plates in pounds can be represented by f(x) = 20x + 4.
What is the range of the function for this situation?
{4, 24, 44, 64, 84, 104, 124)
{4, 44, 84,124)
C {0, 1, 2, 3, 4, 5, 6)
D) {0, 2, 4, 6)