Question

Plz help!!

Suppose the linear cost function C(x) = 6x gives the cost for buying x items. If the items are sold in packages of 10, and no one can buy more than 5 packages, then the RANGE of the function C is
A) [0, 50]
B) [5, 10]
C) {0, 6, 12, 18, 24, 30}
D) {0, 60, 120, 180, 240, 300}

Answer 1

The range of the function C(x) = 6x is [0, 30].

Step-by-step explanation:

The linear cost function C(x) = 6x gives the cost for buying x items. Since the items are sold in packages of 10 and no one can buy more than 5 packages, the maximum value for x is 5. Substituting x=5 into the cost function gives C(5) = 6 * 5 = 30, which is the maximum cost. The minimum value for x is 0, which represents not buying any items. Therefore, the range of the function C is [0, 30].

Answer 2

the most appropriate answer is D !!

if you need explanation, comment ! or it's OK ! I guess it is D !