A line chart shows the daily closing price of the S&P 500 index over time, with time on the x-axis and price on the y-axis. The visualization is built using Vega-Lite’s declarative specification, rendered with vega-embed, which loads and parses the JSON spec referencing a remote CSV of historical price data. The chart uses the “line” mark with temporal and quantitative encodings, and is sized at a fixed width of 360 pixels.