A dual axis chart is useful for comparing two measures that ___________.

Question

Options

• Aare Table Calculations
• Bhave different scales
• Care aggregated Dimensions
• Dhave little in common

• A
  3% (1)
• B
  87% (33)
• C
  3% (1)
• D
  8% (3)

Explanation

A dual axis chart places two measures on separate Y-axes (left and right), making it ideal when those measures exist on different scales - for example, Revenue in millions alongside a Conversion Rate as a percentage; on a single axis, one measure would appear nearly flat and unreadable.

Why the distractors are wrong:

• A (Table Calculations): Whether measures are Table Calculations is irrelevant to axis choice - Table Calculations affect how values are computed, not how axes are scaled.
• C (aggregated Dimensions): Dimensions are not measures; you can't plot a dimension on a dual axis in a meaningful sense, making this option category-confused.
• D (have little in common): If measures have little in common conceptually, there's usually no reason to display them together at all - the purpose of a dual axis is to compare related measures, just ones with scale mismatches.

Memory tip: Think "dual axis = dual scale." The whole point is that one axis can't fairly represent both measures - so you give each its own ruler.

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