{"version":"1.0","type":"rich","title":"A4-D3-BarChart","description":"This bar chart displays the average city fuel efficiency (MPG) of cars across different model years, with each bar representing a year’s mean value and labeled with its numeric result. The visualization uses D3.js v7 to load CSV data, aggregate it with `d3.rollups`, and render an SVG with `d3.axisBottom` and `d3.axisLeft` for axes. Bars are drawn as `rect` elements scaled by `d3.scaleBand` and `d3.scaleLinear`, with the dataset sourced from a GitHub-hosted cars.csv file.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/fbb1558f200e49348e2e8d419ae3f312?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}