← Practice challengesFree companion · 15 minute suggested activity

Explain chart meaning without color alone

Visualization practice · A useful chart makes its units, population and limitations inspectable.

Learn → Try → ExplainReviewed 2026-10-15

Your task

Create a chart distinguishing Web EUR 330 and Store EUR 370. Sketch the view and write an accessible text alternative.

Hint

Start with the decision and the comparison. Avoid decorative marks that compete with the evidence.

Worked solution

Use direct text labels and consistent positions, plus accessible colors. A reader must identify each category without relying only on red/green. Provide a two-row data table as an alternative.

Review checklist

Can someone recover the values, period, population and denominator from the chart and text? State one conclusion the evidence does not support.

Make the reasoning yours.

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