{"version":"1.0","type":"rich","title":"A7: Line Chart","description":"This multi-line chart visualizes average horsepower by year for Audi, BMW, Toyota, and Ford, using data from a CSV file loaded via `d3.csv`. Each car brand appears as a distinct colored line, with a legend generated using `d3.legendColor`. The chart aggregates values with `d3.rollup` and `d3.mean`, then renders line paths using `d3.line` on a linear scale axis, filtering to years from 2010 onward.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c91b7f0108f54dbd8664e8b14b553ce6?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}