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A sequential colour scheme is appropriate when the data

  • A.record the presence or absence of a feature
  • B.run from low to high in one direction
  • C.diverge either side of a meaningful midpoint
  • D.fall into unranked named categories

Answer: B

Correct answer: run from low to high in one direction

A sequential scheme runs from light to dark in a single hue and encodes order in the value, which is exactly right for data with one direction of increase. Data diverging either side of a meaningful midpoint need a diverging scheme with two hues meeting at a light centre, and unranked categories need a qualitative scheme of distinct hues at similar value.

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