This bubble chart visualizes the correlation between resting blood pressure, maximum heart rate, and cholesterol levels using a medical dataset. Each circle's position represents blood pressure and heart rate, while its radius encodes cholesterol and color indicates slope type. The visualization uses d3.csv to load data, d3.scaleLinear for axes and bubble sizing, and d3.scaleOrdinal with d3.interpolateTurbo for color mapping. Hover interactions reveal tooltips showing the slope category, with SVG rendering and smooth opacity transitions enhancing readability.