This visualization displays temperature measurements for New York, San Francisco, and Austin over time, using multiple colored lines on a shared time axis. The chart lets users click on city labels to show or hide corresponding lines, with hover interactions resetting stroke colors. Built with D3 v7, it loads a TSV dataset, parses dates with `d3.timeParse`, and renders SVG paths via `d3.line` with curve interpolation. The y-axis is labeled in degrees Fahrenheit, and lines are colored using `d3.scaleOrdinal` with `d3.schemeCategory10`.