A scatter plot visualizes heart disease data by mapping resting blood pressure on the x-axis and serum cholesterol on the y-axis. Each dot represents a patient, colored by chest pain type (blue, green, red, purple) with a hover tooltip showing age, sex, and pain category. The chart uses d3.csv to load the heart_disease.csv dataset and d3.scaleLinear, d3.scaleOrdinal, d3.axisBottom, and d3.axisLeft to render the SVG visualization.