My Line Chart
This line chart visualizes a user’s 2020 internet usage in gigabytes over time, with a highlighted band marking usage above 100 GB. The D3 v5 code loads CSV data, uses `d3.scaleTime` and `d3.scaleLinear` for axes, and draws the line with `d3.line`. It includes interactive tooltips triggered by `mousemove` events on a transparent overlay, using `d3.scan` to find the closest data point. The SVG rendering features custom axes, labels, and a dashed vertical guide.