we learn that the supply and demand for a good or service can shift in response to changes in certain variables, as well as how supply and demand interact to determine the market equilibrium price.

Please identify a price change that you have noticed in the last few years.
Use the supply and demand model to explain why the price changed in 1) above.
Summarize your explanation in one sentence by stating what you believe happened to supply and demand, why, and how this interaction resulted in the price change you observed. If both curves are moving, you must explain the magnitude of each shift to justify the price change you observed.
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Please do not try to explain the cost of gas or a cell phone; instead, choose something else.

Helpful hint: make sure you discuss both supply and demand, as they both play a role in determining the price.