A line chart shows temperature readings across a week in San Francisco, with a smooth curved path rendered over a grid of horizontal and vertical axis ticks. The visualization uses D3 v5's `scaleTime` and `scaleLinear` for the axes, `line` with `curveBasis` to generate the path, and `axisLeft`/`axisBottom` for tick marks. Data is loaded as CSV from an external URL, with timestamps parsed into Date objects. SVG rendering places the chart inside a 960×500 viewport with large margins and styled axis titles.