This line chart shows the cumulative Quidditch points for four Hogwarts houses across match numbers, with each house represented by a distinct colored line and a legend. The visualization uses D3.js 6.7.0 with a linear x-scale for match numbers and a linear y-scale for points, rendering SVG paths via `d3.line` and axis generators. Data is loaded as CSV text from a GitHub gist and processed in `index.js` to compute per-house cumulative totals, while `lineChart.js` handles the chart structure and styling.