This visualization displays temperature data over time as a line chart with circular markers for each data point. The x-axis uses a time scale (d3.scaleTime) with day-of-week tick labels, while the y-axis uses a linear scale (d3.scaleLinear). Built with React and D3 v5, it renders SVG elements, with the line path created using d3.line() with curveNatural smoothing. Data is fetched via d3.json from a world-atlas TopoJSON file (though the chart plots temperature readings, not map features). Hovering over circles shows tooltips formatted with d3.timeFormat.