The aggregate supply curve shows

Question

BlackTom AI · Accepted Answer

Aggregate supply represents how much real output (real GDP) firms in the whole economy are willing and able to produce at different overall price levels.

1) Relevant knowledge points and concepts
- Aggregate supply (AS) relates aggregate output (real GDP) to the overall price level, holding other factors constant.
- In the short run the AS curve is upward sloping (higher price level → higher profits and more output); in the long run it is vertical at potential (natural) output.
- Aggregate demand (AD), not AS, shows the inverse relationship between price level and quantity demanded of real GDP.
- Other macroeconomic concepts: interest–investment relationship describes investment demand, and total household income is national income, not AS.

2) Step‑by‑step reasoning
- By definition, the AS curve plots quantity of real GDP supplied (horizontal axis) against the overall price level (vertical axis).
- When the price level rises (with nominal wages or costs fixed in the short run), firms find it more profitable to increase production, so quantity supplied rises → upward slope in SRAS.
- Long‑run aggregate supply (LRAS) is vertical because real output is determined by resources and technology, not the price level.
- Therefore the AS curve’s primary description is about quantity of real GDP at different price levels.

3) Calculations / intermediate steps
- No numerical calculation is required for this conceptual question. The logical mapping is: AS → (Price level) → (Quantity of real GDP supplied).

4) Why the correct answer is correct
- Option c explicitly states the AS curve shows “the quantity of real GDP that would be produced in an economy, at different price levels,” which matches the textbook definition of aggregate supply.

5) Why other options are incorrect
- a. Describes the relationship between interest rates and investment (investment demand), not aggregate supply.
- b. Describes total household income (aggregate income or national income), not the supply of output at price levels.
- d. Claims an inverse relationship between quantity supplied and price level; that contradicts SRAS (which is upward sloping) and the definition of AS.

6) Conclusion
- The correct choice is c. the quantity of real GDP that would be produced in an economy, at different price levels. This matches the provided answer.

The aggregate supply curve shows单项选择题

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