This scatter plot visualizes 50 rows of real car data, mapping horsepower on the x-axis and miles per gallon on the y-axis, with points colored and shaped by the car’s origin using `d3.scaleOrdinal` with `d3.schemeTableau10` and `d3.symbol` types. Built with D3 v7, it renders an SVG with axes, labels, and a legend, loading data via `d3.csv` from a GitHub gist. The reusable chart pattern exposes setter methods for configurable dimensions and accessor functions.