Marginal Cost and Average Total Cost Curves Practice Quiz (AP Micro)

📚 Topic Summary

In economics, understanding the relationship between marginal cost (MC) and average total cost (ATC) is crucial. Marginal cost represents the change in total cost resulting from producing one additional unit. Average total cost, on the other hand, is the total cost divided by the quantity produced. The MC curve intersects the ATC curve at the ATC curve's minimum point. When MC is below ATC, ATC is decreasing; when MC is above ATC, ATC is increasing.

🔤 Part A: Vocabulary

Match the following terms with their definitions:

1. Marginal Cost (MC)
2. Average Total Cost (ATC)
3. Fixed Costs
4. Variable Costs
5. Economies of Scale

Definitions:

1. The cost that do not change with the level of output.
2. The cost that varies with the level of output.
3. The decrease in average total cost as output increases.
4. The change in total cost resulting from producing one more unit of output.
5. Total cost divided by the quantity of output.

Match the number to the corresponding number of definition.

✍️ Part B: Fill in the Blanks

The marginal cost curve typically has a U-shape due to the law of ________ returns. When marginal cost is ________ average total cost, average total cost is decreasing. The ________ point of the average total cost curve is where marginal cost equals average total cost.

🤔 Part C: Critical Thinking

Explain why the marginal cost curve intersects the average total cost curve at the minimum point of the average total cost curve. Use real-world example to support your explanation.