Spot the visual cue in a dual-axis chart that invites a false relationship claim.
The crossing feels meaningful. The separate scales make it suspect. Find the feature that most strongly creates the fake relationship cue. The crossing point between the two differently scaled lines Correct. A crossing on separate axes can be moved by rescaling, so it is not evidence of equality or causality. The left-side scale rail One scale is part of the setup, but the misleading cue is the apparent crossing created by the two scales together. The right-side scale rail The right scale is a warning sign, but the reader's false inference is triggered by the aligned crossing in the plot…
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