This example visualizes the classic Iris Dataset, mapping petal width and sepal length to a scatter plot’s x and y axes. Each species is represented by a distinct symbol, chosen via an ordinal scale applied to the categorical data. The chart is built with D3’s `scaleLinear`, `axisLeft`, `axisBottom`, and `symbol` APIs. The reusable `scatterPlot` custom function encapsulates the chart’s configuration, including dimensions, margins, and symbol size, and renders the result as an SVG in a vanilla HTML page.