{"version":"1.0","type":"rich","title":"Brush, Trendline, Legend, Title, Linechart, Barchart","description":"This interactive D3 v5 visualization compares groundwater levels at two EPA monitoring wells against effective rainfall in a swamp marsh, using a main line chart with a linked brush chart and vertical bar histogram. Users brush a time range in the lower chart to filter the main view, which recomputes a dashed trendline via a least-squares regression function and displays its equation. The upper SVG rendering includes dual y-axes, a categorical color legend, and derives data from external CSV files parsed with `d3.timeParse` and plotted with `d3.line`, `d3.brushX`, and `d3.axisBottom`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/0d5e324fe65841349242c53ba897e97c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}