This scatterplot visualizes the Iris dataset, plotting petal length against sepal length for individual flowers. The SVG chart uses D3 v7's `scaleLinear`, `axisBottom`, and `axisLeft` to map data to screen coordinates and render labeled axes. Circles represent each data point, loaded via `d3.csv` from a GitHub gist, with numeric fields parsed on import. The visualization fills the entire browser window by setting the SVG dimensions to `window.innerWidth` and `window.innerHeight`.