This example visualizes the classic Iris Dataset, plotting petal length against sepal width. A responsive tooltip, implemented with SVG `<title>` elements, reveals each flower's petal length on hover. Built with React and D3 v5, it uses `scaleLinear` from `d3-scale` to map data values, plus custom React components for axes and marks. The chart uses a clean, stylized design with a Poppins font and muted green and teal colors.