This reusable scatter plot visualizes the relationship between horsepower and top speed for 150 cars, with points colored by brand category (economy, luxury, or sports). Hovering over a point reveals a tooltip with the category and axis values. Built with D3 v7, the chart uses a custom `scatterPlot()` function that accepts configurable accessors for x, y, and color values, along with axis labels. The SVG output includes gridlines, ordinal color scaling, and data loaded from a CSV via `d3.csv`, demonstrating a modular visualization pattern.