A scatter chart displays the relationship between horsepower and weight for cars from the auto-mpg dataset. Each circle represents a vehicle, showing a positive correlation between the two variables. The visualization uses D3 v5 with SVG rendering, employing `scaleLinear` for both axes and `axisBottom`/`axisLeft` for ticks. Data is loaded via `csv()` and values are parsed as numbers. The chart features custom axis labels, grid lines via tick sizes, and green semi-transparent circles with a title.