An interactive scatterplot of the Iris dataset, built with React and D3, lets users explore relationships between sepal and petal measurements. Two dropdown menus select which quantitative attributes to plot on the x- and y-axes, while the scales and axes update accordingly. The SVG visualization uses D3 scales (`scaleLinear`, `extent`) to map data coordinates, with React components (`Marks`, `AxisBottom`, `AxisLeft`) rendering circles and tick marks. Data loads asynchronously via `d3.csv`, and hover tooltips reveal precise values using the SVG `<title>` element.