A scatter plot displays temperature readings from San Francisco over a week, with time on the x-axis and temperature on the y-axis. Each circle represents a data point from a CSV file loaded via `d3.csv`. The visualization uses D3 v5’s `scaleTime`, `scaleLinear`, and axes to render the SVG, with gridlines and labeled axes. The title labels the chart as "Cars: Horsepower vs. Weight," though the plotted data is temperature-based. Circle styling uses a fixed fill color, and margins position the plot within a 960x500 SVG canvas.