The change in the price level over time due to negative economic growth and the subsequent shift in long-run aggregate supply is known as Demand side inflation.
From the graph below, economic expansion is expected to result in a forward shift of the long-run aggregate supply curve and reflects an increase in the economy's productive capacity. This growth means that the production possibilities curve (PPC) will expand outward and leads to higher long-run output levels.
As a result, the long-run aggregate supply curve will shift to Lras2.
Consequently, with the given aggregate demand, the aggregate supply curve will intersect the aggregate demand curve at a reduced price level (denoted as P2) and establishes a new equilibrium level labeled as E2.
Note: The full question with graph is attached below.