Read the Chart

Four chapters, each one of the first great data charts, redrawn from the numbers in the original. Pick a chart to start.
Answer by touching the chart: drag across it to see what it holds, then let go on your answer. With a mouse, point and click.
Some questions have answer cards instead.
After each answer, a line says what the chart showed and how its design made that easy to see.
Your progress stays on this device. ← Charts goes back to the four.

With the keys, move over the chart with the arrows and answer with Enter.

A bug, a puzzle that felt unfair, an idea? Tell us: we read everything.

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