This bubble chart visualizes the correlation between max speed, acceleration, and fuel efficiency for various car brands, with each circle's size representing fuel efficiency and color encoding brand identity. The visualization includes a tooltip that displays the brand name on hover, as well as legends for both fuel efficiency values and brand categories. Built with D3 v7, the chart uses d3.csv to load data, d3.scaleLinear for positioning and sizing, d3.scaleOrdinal for colors, and SVG circle elements with mouse event handlers for interactivity.