This example demonstrates a reusable D3.js scatterplot that visualizes the Iris dataset, plotting petal width against sepal length. The chart uses d3.scaleLinear for both axes, d3.axisLeft and d3.axisBottom for tick marks, and SVG circles for data points. The code implements a modular, configurable scatterPlot function with settable properties for width, height, data, margins, and radius, allowing the same visualization to be easily reused with different datasets or configurations. The rendering is fully SVG-based and fills the browser window.