This visualization plots daily temperature readings for New York, San Francisco, and Austin as smooth, colored lines over time using D3.js v7 with an SVG renderer. Users can click on a city label to toggle the visibility of its corresponding line, effectively filtering which data series are displayed. The chart includes a time-based x-axis, a temperature y-axis, and a zoom interaction (d3.zoom) for panning and scaling. Data comes from a TSV file loaded with d3.tsv.