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Gr 1–4—A picture book biography of the inventor of the three most frequently used infographics: the line graph, the bar graph, and the pie chart. William Playfair (1759–1823) grew up in Scotland, was educated by his mathematician and scientist brother, and later worked for inventors Andrew Meikle and James Watt. So why don't more students know his name? The author suggests that even though Playfair was a creative thinker, he was...Log In or Sign Up to Read More