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A graduated symbol map differs from a proportional symbol map in that it

  • A.scales every symbol continuously by value
  • B.shades whole areal units rather than points
  • C.places dots of a constant value on the map
  • D.uses a small number of fixed symbol sizes

Answer: D

Correct answer: uses a small number of fixed symbol sizes

A graduated symbol map classifies the data first and assigns one symbol size per class, so the reader matches sizes against a legend of discrete steps. A proportional symbol map scales every symbol continuously by its own value. The graduated form is easier to read and to compile; the proportional form preserves the detail that classification throws away.

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