This example visualizes the relationship between inflation rate and average first-semester grades, using a line chart with circular markers. The visualization aggregates data from a CSV file by grouping student records by inflation rate and calculating the mean grade for each group. Built with D3.js v7 and rendered as an SVG, it uses `d3.csv` for loading data, `d3.rollups` for aggregation, and `d3.line` for the path. Interactive tooltips appear on hover, displaying the exact inflation rate and average grade for each point.