This scatter plot visualizes the relationship between horsepower and weight for cars from the UCI Machine Learning Repository’s Auto MPG data set. Red semi-transparent circles encode each car’s values, with axes labeled “Horsepower” and “Weight.” Built with D3 v5, the code uses `d3.csv` for loading, `d3.scaleLinear` with `d3.extent` for scales, and `d3.axisBottom` and `d3.axisLeft` to render gridlines and tick labels. The SVG output includes a title and styled axis text via CSS.