{"version":"1.0","type":"rich","title":"Question 4: Area Chart","description":"This area chart visualizes monthly revenue trends across multiple products, with each product represented as a colored filled region that can be hovered to adjust opacity. The chart uses D3 v7 to load CSV data via `d3.csv`, aggregates revenue by product and month using `d3.group` and `d3.rollup`, and renders the areas with `d3.area` alongside scaled point-based x-axes (`d3.scalePoint`) and linear y-axes (`d3.scaleLinear`). Interactive dots respond to mouse hover by increasing their radius, and gridlines provide reference for revenue values.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/60f18b464fc442299e431ab5cc252f3a?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}