Short Answer

Distinguishing Demand Changes on a Graph

Consider a city's rental housing market represented by a standard supply and demand diagram, with rent on the vertical axis and the number of tenancies on the horizontal axis. An economist observes two separate phenomena:

  1. A city-wide decrease in average rent leads to an increase in the number of apartments rented.
  2. A major tech company opens a new headquarters in the city, leading to more people wanting to rent apartments at every possible rent level.

For each phenomenon, state whether it is represented by a 'shift of' the demand curve or a 'movement along' the demand curve, and briefly explain your reasoning.

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Updated 2025-07-30

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