This bubble chart plots average horsepower against average torque for various car brands, with each circle's size encoding the brand's highway miles per gallon, and its color encoding the brand name. Built with D3.js, the visualization reads from a CSV file and implements a custom legend for the categorical color mapping. Circle positions are defined by the x- and y-axes, which use linear scales, while the size scale is also linear. Interactive tooltips appear on mouseover, showing the car make. The chart is rendered as an SVG with transitions for tooltip display.