Video Transcript Line graphs Line graphs are used to show continuous changes over time. A line graph might be useful for showing the pattern of change in world population, for example.

Unlike their bar and candlestick cousins, line charts only display the closing price of an asset over time. So if we look at the daily chart for spot gold, for example, each data point represents the ...

William Playfair, data visualisation, bar graph, pie chart, line graph, Scottish engineer, statistical graphics, The Commercial and Political Atlas, The Statistical Breviary, 18th-century innovations ...