The aggregate supply curve shows

Question

BlackTom AI · Accepted Answer

Aggregate supply (AS) plots the relationship between the overall price level and the total quantity of real GDP (output) that firms in an economy are willing to produce and sell.

1) Relevant knowledge points and concepts
- Axes: price level on the vertical axis, real GDP (output) on the horizontal axis.
- Short-run aggregate supply (SRAS) is typically upward sloping: as the price level rises, firms can increase output because higher product prices raise revenues faster than some input costs in the short run.
- Long-run aggregate supply (LRAS) is often drawn vertical at potential GDP, showing output determined by resources and technology, not price level.
- Shifts in AS are caused by changes in resource availability, technology, input costs, or expectations (not by movements along the curve).

2) Step-by-step reasoning
- The AS curve describes how much real output firms supply at each possible price level; a change in the price level produces movement along the AS curve.
- A rise in the price level (holding costs and productivity constant) leads firms to supply more in the short run → movement up along SRAS.
- A change in factors like labor, capital, or productivity shifts AS (right for growth, left for reductions).

3) Calculations
- No numeric calculation is required: the relationship is conceptual (price level vs. quantity of real GDP).

4) Why the correct answer is correct
- Option d explicitly states that the AS curve shows "the quantity of real GDP that would be produced in an economy, at different price levels," which matches the definition and graphical interpretation of AS.

5) Why the other options are incorrect
- a. Claims an inverse relationship: that describes aggregate demand (or wrongly implies AS is downward sloping). SRAS is upward sloping; LRAS is vertical.
- b. Refers to interest rates and investment: that is the investment demand curve or part of IS/LM analysis, not AS.
- c. Describes total household income (national income), not the supply of output at various price levels.

Conclusion: The explanation confirms option d is correct: the aggregate supply curve shows the quantity of real GDP that would be produced at different price levels.

The aggregate supply curve showsSingle choice

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