This example visualizes the relationship between study hours and exam scores using a scatter plot, where each circle represents a student. The data comes from a CSV file loaded with D3’s `d3.csv` method and filtered to exclude zero-value pairs. The SVG chart uses `d3.scaleLinear` for both axes, `d3.axisBottom`, and `d3.axisLeft` for tick marks, while circles are appended with `d3.selectAll` and `enter`. Interactive tooltips appear on mouseover, displaying the exact hours and scores for each point. All rendering is done with React-compatible vanilla JavaScript and D3 v6.