This interactive multi-series line chart shows daily temperature trends for New York, San Francisco, and Austin, rendered as SVG paths with distinct colors. The visualization supports pan and zoom through d3.zoom, with a rescaleX transform that dynamically updates the x-axis and redraws each line using d3.line with curveBasis smoothing. Hovering highlights a city’s label and line via CSS classes that increase stroke width and reduce opacity of other lines. Data is loaded from a TSV file using d3.tsv, with time parsed via d3.timeParse and scales defined by d3.scaleTime and d3.scaleLinear.