Untitled
A multi-line chart displays the monthly average arrival delay for 19 airlines, with a dropdown menu to select a specific airline and a hover interaction that reveals the airline's delay rank and average delay time. The visualization uses D3 v7 to render an SVG, employing `d3.scaleBand` for the x-axis, `d3.scaleLinear` for the y-axis, and `d3.line` with `transition` to animate path updates. Data is loaded from a CSV file via `d3.csv`.