A line chart displays annual sales over time, with a single thick maroon line tracing the trend. The visualization uses D3 v5 to load CSV data via `d3.csv`, parse dates with `d3.timeParse`, and construct scales with `scaleTime` and `scaleLinear`. Axes are generated using `axisBottom` and `axisLeft`, while the line path is created with the `d3.line` generator. The SVG rendering includes labeled axes and gridlines, with data sourced from a GitHub gist.