Draw the graph · Micro · Supply and demand
Better seeds raise yields
Ddemand
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Ssupply
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Drag a curve sideways, or use its arrows. A curve you do not move is a curve you are saying stays put. Make each shift clear enough that a reader could see it.
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Demand stays put. Supply shifts right.
Technology is a supply-side factor. With more corn per acre for the same effort, farmers can offer more at every price, so supply shifts right. Demand is unchanged. The lower price moves buyers down along their demand curve.
Price falls and quantity rises.
Common mistake. Students sometimes shift demand right because 'corn gets cheaper.' Cheaper corn is the result of the supply shift. The extra buying is a movement along demand.
More supply and demand prompts
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Lesson: The Supply Curve
Every prompt here is one shift. The course chains them: a lesson on why the curve moves, a graded drawing, and spaced review that brings back the shifts you get wrong.