This scatter plot visualizes car performance by plotting speed (km/h) against fuel efficiency (mpg) for five car models over four years. Each point represents a single year’s data, with distinct colors (red, blue, green, orange, purple) assigned per car brand, sourced from an embedded CSV table. Built with D3 v6, the SVG chart uses `d3.scaleLinear` for axes and `d3.axisBottom`/`d3.axisLeft` for ticks, while circles are appended via `.selectAll().data().enter()`. The code shows a static rendering with `svg` output, and no animation or interaction is implemented.