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State whether the following is true or false.
If proportional circles are scaled so that radius is directly proportional to the data value, larger values are exaggerated.

  • A.True
  • B.False
  • C.True only at large scales
  • D.False only at small scales

Answer: A

Doubling the radius quadruples the area the eye actually compares, so the larger circles look far greater than they are. Scaling by area is the standard correction, and Flannery's adjustment goes further to allow for systematic underestimation.

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