This interactive scatter plot visualizes the relationship between fuel efficiency (mpg) and horsepower for a collection of automobiles, with each point’s color indicating the country of origin and its size representing vehicle weight. It was built using the Vega-Lite API, which compiles specifications into a rendered Vega visualization. The code reads the Auto MPG dataset from a CSV via `d3.csv`, then dynamically sets the chart’s width and height to fill the browser window. The visualization includes a tooltip handler and custom styling for axis labels and titles.