A horizontal bar chart ranks the top 10 car brands by mean price, using 150 synthetic records from Automobiles.csv. Brand names label the y-axis, while price in dollars spans the x-axis. The React app loads the CSV with d3.csv, computes averages with d3.rollups, and renders rounded rectangles whose widths map to average price. Axes are drawn with d3.axisBottom and d3.axisLeft. Hovering reveals a tooltip with the brand and exact average price.