This example presents a reusable scatter plot built with D3.js and React, displaying the Iris dataset with petal length on the x-axis and sepal length on the y-axis. The visualization is rendered as an SVG, with circles sized by a configurable radius and axes generated using D3’s `scaleLinear`, `axisBottom`, and `axisLeft`. A custom `scatterPlot()` function encapsulates the chart logic, allowing width, height, margins, and data accessors to be set via a fluent interface, demonstrating a modular approach to building interactive visualizations with D3 v7.