This bar chart visualizes the relationship between a car’s retail price and its city miles per gallon, with each bar representing a vehicle from the cardata.csv dataset. The chart uses D3 v5 to load the CSV data and render the visualization as an SVG. Axis labels and titles are styled using CSS classes, while the bars themselves are positioned and scaled based on the data values. The example demonstrates how D3’s `csv` method loads external tabular data for chart construction.