Draw the graph · Micro · Supply and demand
Recession and instant noodles
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 shifts right. Supply stays put.
Income is a demand-side factor, and for an inferior good the sign flips. As incomes fall, households trade down, wanting more instant noodles at every price. Demand shifts right. Factory costs are unchanged, so supply stays put.
Price rises and quantity rises.
Common mistake. The trap is to shift demand left because 'incomes fell.' That is right for a normal good and wrong here. For an inferior good, falling income raises demand.
More supply and demand prompts
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Lesson: Normal vs Inferior Goods
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.