This bubble chart displays the relationship between car models, their fuel economy in miles per gallon, and engine cylinder count. Each car is represented as a circle positioned along the x-axis by car name and y-axis by economy rating, with circle radius encoding cylinder count. The visualization uses d3.csv to load sample.csv, d3.scaleBand for the categorical x-axis, d3.scaleLinear for the y-axis, and d3.scaleSqrt for the radius mapping. SVG circles are rendered directly into the DOM, with axes generated via d3.axisBottom and d3.axisLeft.