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A proportional symbol map represents magnitude by

  • A.varying the size of a symbol at each location
  • B.shading the whole area in which the value falls
  • C.placing one dot for each unit of the quantity
  • D.drawing lines that join places of equal value

Answer: A

Because the symbol sits at a point rather than filling an area, it can carry a raw total without the unit-size problem that affects choropleth maps. The reader compares areas of circles instead of densities of shading.

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