A reusable scatter plot shows the relationship between study hours and exam scores across four categories (A–D), with points colored by category and a legend identifying each group. The chart uses D3.js v6 with the reusable chart pattern, implementing scales via `scaleLinear` and `scaleOrdinal`, axes through `axisLeft` and `axisBottom`, and `schemeSet2` for colors. Data is loaded from a CSV file using `d3.csv`, and the plot is rendered as SVG with circles positioned using the configured x and y accessor functions.