This bar graph displays five categorical values (ranging from 10 to 30) as steelblue rectangles. Built with D3 v7, the visualization uses `d3.scaleBand` to position categories along the x-axis and `d3.scaleLinear` for the y-axis, with coordinates mapped to 400-by-300-pixel SVG dimensions. The code renders axes using `d3.axisBottom` and `d3.axisLeft`, drawing the chart into an HTML container.