This scatter plot visualizes the Iris dataset, mapping petal length on the x-axis and sepal length on the y-axis. Each flower is rendered as an SVG circle using D3 v7, with positions scaled linearly via `d3.scaleLinear` and extents computed from the data. The axes are drawn using `d3.axisLeft` and `d3.axisBottom`, and the visualization fills the browser window. Data is loaded asynchronously with `d3.csv` from a remote GitHub gist, and circles are joined to the SVG using `selection.join`.