This interactive scatter plot visualizes the auto-mpg dataset, allowing users to explore relationships between vehicle attributes like miles per gallon, horsepower, and weight. Two dropdown menus let viewers select which attributes appear on the X and Y axes. A color legend on the right encodes car brand; hovering over a legend entry highlights only that brand's points and dims others. The visualization is built with React and D3 v5, using `scaleLinear` for axes, `scaleOrdinal` for colors, and custom `AxisBottom`, `AxisLeft`, `ColorLegend`, and `Marks` SVG components.