A line chart visualizes car sales from 2001 to 2010, plotting yearly values as a red path over a time-based x-axis and linear y-axis. The D3 v5 code uses `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and `line` to generate an SVG rendering. Data is loaded as CSV from a GitHub gist, with year and sales values parsed before scaling. The chart includes labeled axes, grid lines via tick sizing, and a title, all styled through an external stylesheet.