This visualization, part of a student performance analysis, uses D3 v7 to render two SVG charts. The first is a multi-series line chart showing how average math, reading, and writing scores trend with binned math ability, using `d3.scaleLinear` and a monotone curve. The second is a combined bar and line chart, built with `d3.rollups`, displaying score distributions across parental education levels. Data is loaded from a CSV Gist, with a categorical color scale and grid lines for clarity.