{"version":"1.0","type":"rich","title":"Area chart","description":"This area chart shows the average fuel efficiency (MPG) of cars by model year, using data from the auto-mpg.csv dataset. The code loads the CSV with d3.csv, filters out invalid entries, aggregates averages with d3.rollups, and renders a smooth, semi-transparent blue area using d3.area with curveMonotoneX. Axes are drawn with d3.axisBottom and d3.axisLeft, and the chart is built in SVG.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/05ae896df86c4f2bab21e47ea245350c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}