This scatter plot displays the Iris dataset, mapping petal width on the x-axis and sepal length on the y-axis. Three species markers use different D3 symbol shapes, generated with `d3.symbol` and `d3.symbols`. A `d3.scaleOrdinal` assigns symbols, while `d3.scaleLinear` handles axes, rendered with `d3.axisLeft` and `d3.axisBottom` in an SVG. The chart is built with a reusable `scatterPlot` function using D3 v6.