中等econ-u04-d03
Average fixed cost is total fixed cost divided by output. As output rises:
A. Average fixed cost falls continuously✓ 答案
B. Average fixed cost first rises then falls
C. Average fixed cost always equals marginal cost
D. Average fixed cost is constant
解說
Total fixed cost does not change with output, so spreading it over more units makes AFC fall all the way. It is still falling at very high output, unlike AVC which turns up.