This visualization displays a week of temperature data for San Francisco as a smooth line chart with overlaid circular markers. The chart uses D3 v6’s `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, and a `line` generator with `curveBasis` to render an SVG path. Data is loaded asynchronously from a CSV via `d3.csv`, with timestamps parsed into `Date` objects. The axes include labeled ticks and grid lines, and the chart is styled with CSS for circles, text, and the line path.