Draw the graph · Micro · Supply and demand
A health warning on cigarettes
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 left. Supply stays put.
Tastes and information are demand-side factors. When fewer people want to smoke, buyers want fewer cigarettes at every price, so demand shifts left. Supply is unchanged. The lower price moves producers down along their supply curve.
Price falls and quantity falls.
Common mistake. Some students shift supply left because 'companies sell fewer cigarettes.' They sell fewer because buyers want fewer. The campaign changed buyers, not producers.
More supply and demand prompts
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Lesson: Shifts in Demand
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.