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Bay Roasters Coffee Market — Supply and Demand

This supply-and-demand example models the weekly market for roasted coffee beans sold to Bay Roasters. The vertical axis is price per bag and the horizontal axis is hundreds of bags sold each week. The upward supply curve represents higher marginal costs as the roaster prepares more bags. The downward demand curve represents buyers purchasing fewer bags as prices rise. Their intersection identifies the model's equilibrium price and quantity. The shaded areas make the gains to buyers and sellers visible. It is a teaching model, not a forecast: actual prices also reflect contracts, inventory, quality grades and competing suppliers and seasonal demand.

Type Graphique économiqueMoteur econ-supply-demandMis à jour 24/09/2026
Bay Roasters Coffee Bean Market
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La demande

“Create a supply and demand graph titled Bay Roasters Coffee Bean Market with supply starting at $3 and rising by $0.50 per hundred bags, demand starting at $15 and falling by $0.50 per hundred bags, labelled axes for bags per week and price per bag, and consumer and producer surplus.”

Essayez ensuiteShow a frost-driven decrease in supply.Change the price axis to dollars per kilogram.
Ce que contient ce dessin

Comprenez les décisions qui le sous-tendent.

01Market scope

use one weekly local market.

02Supply rule

make marginal costs slope upward.

03Demand rule

make willingness to pay slope downward.

Use this model to explain equilibrium and surplus in a single competitive market.

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FAQ

Questions fréquentes

What does the intersection mean?

It is the equilibrium in this model, where quantity supplied equals quantity demanded.

Why does supply slope upward?

Producing additional units often raises marginal cost, so sellers require a higher price.

Why does demand slope downward?

Buyers generally purchase fewer units when the price rises, holding other factors constant.