This line chart visualizes temperature changes in San Francisco over time using a smooth curved line, with time on the x-axis and temperature on the y-axis. It loads CSV data from a `vizhub.com` dataset and renders with D3 v5’s `d3.line`, `d3.scaleTime`, and `d3.scaleLinear`. The SVG output includes axis labels, a title, and grid lines, with styling defined in CSS. The data is preprocessed by parsing timestamps and numeric temperature values before rendering.