This bar chart visualizes student test marks, with each bar’s length representing a score from 1 to 100. Built with D3 v5, it uses `d3.scaleLinear` for the x-axis, `d3.scaleBand` for categorical student labels, and `d3.axisBottom` with a custom tick formatter that abbreviates numbers. The SVG renders steel-blue rectangles, and the chart includes axis labels and a title. Data is loaded from a CSV and multiplied by 1,000 during preprocessing.