{"version":"1.0","type":"rich","title":"Assignment 6: Line Chart with Color Legend ","description":"This visualization displays average carrier values per airport category across years as a multi-line chart, with each of four categories drawn as a distinct colored line. The chart uses D3.js v7, loading data from a remote CSV file and aggregating it by year and category. It leverages D3’s `scaleLinear` for axes, `scaleOrdinal` with a ColorBrewer `Set2` palette for the categorical color scheme, and `d3.line` for path generation. An HTML/SVG legend, built via the d3-legend library, accompanies the plot, with axes and lines styled via CSS.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/471098776e274f29a2dbbaf5807baee6?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}