This example uses D3 v6 with React to render the classic Iris dataset as an SVG scatterplot. The visualization maps sepal length to the x-axis and sepal width to the y-axis using d3.scaleLinear and d3.extent for domain calculation. Each circle has a radius of 30 pixels and is positioned through xScale and yScale functions. The code sets an onmouseover attribute on circles to change their fill color to red, though the styling is implemented via inline attribute rather than D3 event handlers. The SVG canvas fills the entire browser window with margins applied.