A reusable D3 scatter plot visualizes the Iris Dataset, mapping petal width and sepal length for different iris species. Each species is represented by a distinct symbol from d3.symbols, including circles, crosses, and diamonds. The plot uses d3.scaleLinear for axes, d3.scaleOrdinal for symbol mapping, and d3.axisBottom/axisLeft for ticks. An SVG renderer displays the points, with margins and a fixed symbol size configured through a reusable chart function.