Final answer:
The average fixed cost curve is a downward sloping curve that decreases as the quantity of output increases. Spreading the overhead refers to distributing the fixed cost over a larger volume of output, resulting in a lower cost per unit.
Step-by-step explanation:
The average fixed cost curve is a downward sloping curve. As the quantity of output increases, the average fixed cost decreases. This is because the fixed cost is spread over a larger quantity of output, resulting in a lower cost per unit.
"Spreading the overhead" means distributing the fixed cost over a larger volume of output. By spreading the overhead, the average fixed cost decreases, making each unit of output less expensive.