An interactive scatterplot of the Iris dataset lets users explore relationships between sepal and petal measurements, with colored dots representing species. A clickable color legend on the right highlights points of a selected species while dimming the others, using React state to track the hovered value. Built with React and D3 v5, the plot renders as SVG and uses scales from `d3.scaleLinear` for axes and `d3.scaleOrdinal` for categorical colors. Dropdown menus allow switching which measurements appear on the x- and y-axes.