This example visualizes the Iris dataset as a scatter plot, showing the relationship between petal length on the x-axis and sepal length on the y-axis. It uses d3.csv to load the data, then employs d3.scaleLinear, d3.extent, d3.axisLeft, and d3.axisBottom to position and label the circles. The SVG is sized to the full window, with margins applied to the scales and axes. Data points are rendered as filled circles using a data join, demonstrating a straightforward workflow for quantitative comparison in D3 v6.