Final answer:
The average fixed cost curve is downward-sloping, decreasing as output increases. Spreading the overhead refers to distributing fixed costs over a larger quantity of output, reducing the average fixed cost per unit.
Step-by-step explanation:
The average fixed cost curve is a downward-sloping curve that starts high at low levels of output and decreases as output increases. When fixed costs are spread over a larger quantity of output, the average fixed cost per unit decreases.
Spreading the overhead refers to the process of distributing the fixed costs across a larger quantity of output, which helps reduce the average fixed cost per unit. This allows for a more efficient use of resources and can lead to economies of scale.