A line chart shows final exam scores for students in a performance dataset, plotted sequentially by student index. The visualization encodes each student as a point connected by a blue line, with axes labeled "Student Index" and "Final Score." The code uses D3 v7's `d3.csv`, `d3.line`, and `d3.scaleLinear` to load data from `data.csv`, generate the SVG path, and draw circles for each data point.