From the following figure, how to obtain an aggregate demand function?

From the following figure, how to obtain an aggregate demand function?
Solution
✅ Correct Option: 4
Option 4: OL -> In demand aggregation diagrams, the aggregate demand function is obtained by horizontally summing individual demand curves. The aggregate quantity demanded at any given price level is measured from the origin (O) to the point representing total demand (L). OL represents the complete aggregate demand, showing the total market demand from the starting point (origin O) to the final aggregate point (L). -> correct
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