This visualization displays a scatter plot of automobile data from the UCI Auto MPG dataset, mapping fuel efficiency (mpg) against horsepower. Each point’s size encodes vehicle weight, while color distinguishes the country of origin. The chart uses the vega-lite-api DSL to construct the specification, with vega, vega-lite, and d3.csv handling data loading and rendering. Custom axis styles and tooltips are applied via vega-tooltip, and the view auto-fits to the window using vega’s autosize configuration.