This scatter plot visualizes the Iris dataset, showing the relationship between petal length and petal width, with each of the 150 flowers colored by species (setosa, versicolor, virginica). The chart uses a D3 v6 pipeline that loads CSV data from a GitHub repository, applies linear scales to map data values to pixel coordinates, and renders points as SVG circles with a fixed radius. The code leverages the `d3.csv`, `d3.scaleLinear`, `d3.extent`, `d3.axisLeft`, and `d3.axisBottom` APIs to construct axes and position marks, while a custom switch function assigns categorical colors to each species group.