This example shows a scatter plot of the Iris dataset, mapping petal length on the x-axis and sepal width on the y-axis. The visualization includes labeled axes, tick marks, and circular marks with hover tooltips. Built with React and D3 v7, it uses `scaleLinear` and `extent` for scaling, and custom components for axes and marks that render SVG elements. Data is loaded asynchronously via `d3.csv` and parsed into numeric values.