A scatter plot of the Iris dataset visualizes petal length against sepal width, with a categorical color legend encoding species. Each circle represents a flower, and hovering reveals its exact petal length via a native SVG `<title>` tooltip. The visualization is built with React components and D3 scales, using `scaleLinear` for axes, `scaleOrdinal` for colors, and `extent` for domains. Axes and legends are custom SVG components, rendered within a fixed 960×500 viewport with margins and labeled axes.