This scatter plot visualizes the relationship between vehicle horsepower and price, using point size to encode sales volume and color to distinguish vehicle type. Built with D3.js v7, the visualization renders data from a bundled Car_sales.csv file as an SVG. The plot includes labeled axes, a hover tooltip for detailed inspection, and separate legends for the color-coded vehicle categories and size-scaled sales figures. The implementation uses D3's selection and scale APIs to map the dataset fields to visual encodings.