1 / 5
A reviewer says: 'Don't rely on colour alone to distinguish the lines.' Why?
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Encoding meaning only in colour excludes colour-blind viewers; redundant cues (patterns, direct labels) help.
2 / 5
A chart uses a 'colour-blind safe palette'. What does that mean?
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Colour-blind safe palettes pick hues that stay distinct for people with deuteranopia, protanopia, etc.
3 / 5
Why add 'alt text' to a chart image?
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Alt text describes the chart's content and key takeaway for users who can't see it.
4 / 5
What does 'sufficient contrast' refer to in a chart?
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Sufficient contrast ensures text and marks are legible against the background per WCAG ratios.
5 / 5
Which sentence correctly uses 'data table fallback'?
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Offering the raw figures as an accessible table lets users who can't perceive the chart still get the data.