This example demonstrates a reusable scatter plot implemented with D3 v7, visualizing the classic Iris dataset by mapping petal width and sepal length along the axes. The plot distinguishes the three Iris species using different SVG symbols, generated through `d3.symbol` and `d3.symbols`, with positions scaled by `d3.scaleLinear` and axes drawn via `d3.axisLeft` and `d3.axisBottom`. The chart is built as a custom function that accepts configurable width, height, margins, and accessor functions, and renders SVG elements after loading data asynchronously with `d3.csv`.