{"version":"1.0","type":"rich","title":"Fork of Fork of Brush, Trendline, Legend, Linechart, Barchart","description":"Two linked line charts, built with D3 v5, visualize EPA groundwater monitoring data from two observation wells. The main chart displays a trendline calculated with a least-squares regression, while a smaller brush chart allows users to select a date range. The brush selection filters the data and updates the trendline and its equation in the main chart, with a color legend distinguishing the wells.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/f9677525e9264197afd3e5267daea39f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}