Question

In map keys, different cities are marked by different-sized dots. Why?

a) To indicate population density
b) To show elevation
c) To represent economic status
d) To signify cultural importance

Answer 1

Different-sized dots on map keys indicate the population size of the cities, relating to the concept of economies of scale. Larger cities with more concentrated economic activities are marked with larger dots. This is not to be confused with elevation, economic status or cultural importance.

Step-by-step explanation:

In map keys, different cities are marked by different-sized dots primarily to indicate the population size of the cities. this method of representation leverages the concept of economies of scale as larger dots typically correspond to cities with more concentrated economic activity, larger populations and thus more potential customers, workers and suppliers. However the choice of dot sizes is not related to showing elevation, representing economic status or signifying cultural importance.

Cities provide numerous economic advantages due to economies of scale, including efficient production scales for businesses, a large base of consumers and labor, and the ability to support larger services like stadiums and museums. Conversely, too high a concentration can lead to diseconomies such as traffic congestion, pollution, and overcrowded facilities, which can negatively affect the quality of life.