A line chart displays one week of temperature readings in San Francisco, with time on the x-axis and temperature on the y-axis, using a smooth curve to connect data points. The visualization uses D3 v5 APIs including `scaleTime`, `scaleLinear`, `axisBottom`, `axisLeft`, `line`, and `curveBasis` to render the SVG. Data is loaded from a CSV file hosted on VizHub, and the chart includes labeled axes, a title, and gridlines via tick sizing.