This reusable D3 scatter plot visualizes the Iris dataset, mapping petal width against sepal length with distinct symbol shapes for each species. Built with d3.scaleLinear, d3.scaleOrdinal, and d3.symbol, it encodes species categories through different symbol types. The chart renders as an SVG, filling the viewport, and includes axis labels via d3.axisLeft and d3.axisBottom. The implementation uses a custom scatterPlot function called with a fluent interface to set dimensions, margins, data accessors, and symbol size.