This bubble chart visualizes the correlation between the number of cylinders, engine displacement, and city MPG for various car models. Each circle represents a car, with its x-position mapped to cylinders, y-position to displacement, and circle size encoding city MPG, while color differentiates car brands. The visualization includes interactive tooltips on hover, a legend for city MPG values, and a color legend for brands. Built with D3.js v7, the code uses SVG rendering, scaleLinear for axes and bubble size, and scaleOrdinal for color mapping.