{"version":"1.0","type":"rich","title":"Multi-Series ","description":"A multi-series chart combines bars for borrow counts and a line for average ratings across book genres, with ratings scaled by 100 to share a single axis. The visualization uses D3 v7 APIs including `d3.scaleBand`, `d3.scaleLinear`, `d3.rollups` for aggregation, and SVG rendering for both elements. Data comes from a CSV file containing genre, borrow count, and rating fields, processed with `d3.csv` and `d3.sum`/`d3.mean`. The chart includes axes, gridlines, and a legend distinguishing the two metrics.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/bdd52cf70cd24a52b8c188e881ec0786?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}