This area chart displays Nike’s annual sales from 2009 to 2019, with a smooth curve overlaid on a shaded region beneath it. The visualization uses d3.csv to load external data, d3.scaleTime and d3.scaleLinear for axes, and d3.line with d3.area and curveBasis to generate the SVG paths. Axis ticks are formatted with d3.format, and d3.timeParse converts date strings into time values.