This scatter plot visualizes student exam performance by plotting hours studied against previous scores, with each dot color-encoded by sleep hours using a sequential turbo scale. The visualization includes interactive tooltips that display additional student details on hover, along with gridlines and rotated axis labels for readability. The code uses D3 v7 with an SVG rendering approach, loading CSV data via `d3.csv` and `d3.autoType` to coerce values, then applying `d3.scaleLinear` for axes, `d3.scaleSequential` for color mapping, and `d3.axisBottom`/`d3.axisLeft` for chart elements.