This scatter plot shows the relationship between patient age and maximum heart rate achieved using data from the Heart Disease UCI Kaggle dataset. Each blue circle represents an individual patient, with age plotted along the x-axis and maximum heart rate along the y-axis. The visualization loads CSV data via `d3.csv`, parses numeric fields, and renders circles as SVG elements with `d3.scaleLinear` for both axes. Axis labels are added manually using SVG text elements, while axes themselves are generated through `d3.axisLeft` and `d3.axisBottom`.