This visualization displays the distribution of average Math SAT scores across all US states in 2015, with a single boxplot summarizing the range from the first to third quartile. The code uses D3 v7 to create an SVG chart, scales the x-axis with `d3.scaleLinear`, and computes quartiles using `d3.quantile` on sorted CSV data loaded via `d3.csv`. The chart includes labeled axes and a title, with dimensions set relative to the browser window.