A scatterplot of auto-mpg data displays horsepower by country of origin, with each point’s size and opacity fixed. The visualization is built using the Vega-Lite API, which compiles specifications to Vega and renders to SVG within a D3 environment. Data is loaded via `d3.csv` from a remote gist, and interactive tooltips are enabled through `vega-tooltip`. The chart fills the browser window, with custom fonts and axis styling configured for readability.