This example displays a scatter plot of the Auto MPG dataset from the UCI Machine Learning Repository, showing vehicle fuel efficiency against horsepower. Each circle’s size encodes vehicle weight and its color represents the country of origin, with tooltips revealing the car model name. The visualization is built using the Vega-Lite API, which compiles specifications into Vega and renders with D3. Data is fetched as CSV via D3’s `csv` function, and styling customizes axis labels and titles for readability.