This visualization displays the relationship between age and cholesterol levels in a heart attack prediction dataset from Kaggle. Each circle represents a patient, positioned by age on the x-axis and cholesterol on the y-axis. Built with React and D3 v7, the visualization loads CSV data and uses `d3.scaleLinear` for axis scaling. Circles are rendered using the D3 `selectAll().join()` method to bind data points to SVG circle elements, creating a scatter plot where all points share the same size and color.