A scatter plot of the classic Iris dataset, mapping petal length on the x-axis and sepal width on the y-axis. Built with React and rendered as SVG, the visualization uses D3 scales and utilities, including `scaleLinear`, `extent`, and `format`, to compute the axes and tick marks. Each point is a circle with a tooltip displaying its x-value. The data is loaded asynchronously from a CSV file via D3's `csv` function.