makes a promise that the graphic delivers on. Given that readers are likely to read the title first, we want the chart’s content to offer the evidence that reinforces and justifies the title. The delightfully intricate content of this graphic by Chris Campbell and Patrick Mathurin may contrast with the simple language of the title – but both title and graphic are in complete agreement on what the data shows.
Smith, Alan. How Charts Work (pp. 242-243). Pearson Education. Kindle Edition.