This bar chart shows the survival rate of Titanic passengers by passenger class, with rates on a 0–100% scale across three class categories. The visualization loads data from titanic.csv using d3.csv, groups records by Pclass, and computes the mean of the Survived field via d3.rollups. Bars are drawn as SVG rectangles using D3 v7’s scaleBand and scaleLinear, with axes generated by d3.axisBottom and d3.axisLeft. The rendering is entirely SVG-based, with labels for both axes and a steelblue fill for each bar.