The horizontal axis of the aggregate demand and aggregate supply model measures the overall quantity of output. Aggregate supply, or real GDP, is the entire amount of product that businesses will generate and sell. Positive association between price level and real GDP in short run is demonstrated by upward-sloping aggregate supply curve.
Upward slope of aggregate supply curve results from incentive to increase output when price level of outputs rises while price level of inputs remains constant. Relationship between amount of total spending in economy and the price level for products is depicted by the aggregate demand curve's downward slope.
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