This example visualizes the relationship between engine displacement and horsepower across a sample of automobiles, with tooltips revealing the car model name for each point. It uses the Vega-Lite API to define a filled line mark with opacity, and renders the visualization as an SVG via the vega, vega-lite, and vega-lite-api libraries. The data is loaded asynchronously from a CSV file using d3.csv, and the chart is automatically sized to fit the browser window. The appearance is customized through a config object that adjusts axis and label styling.