A reusable D3.js scatter plot displays the relationship between study hours and exam scores for roughly one hundred students, revealing a generally positive correlation with some variance. Built with D3 v7, the chart uses a factory function returning a chart that can be applied to different data selections, with `d3.scaleLinear` for axes and `d3.axisBottom`/`d3.axisLeft` for ticks. Data is loaded via `d3.csv` from a local CSV file, with numeric fields parsed and rendered as semi-transparent steelblue circles in SVG.