This scatter plot visualizes the relationship between horsepower and weight for cars from the UCI Machine Learning Repository’s Auto MPG data set. It renders circles on an SVG canvas using D3 v5, with axes, labels, and a title. The code uses D3’s `csv` loader, `scaleLinear`, `axisBottom`, and `axisLeft`, along with a custom `menu` function to provide simple A/B/C selector options. Data preprocessing converts numeric fields from strings to numbers before scaling and plotting.