A scatter plot displays the correlation between horsepower and torque for BMW models from 2009 to 2012, using data loaded from an external CSV file. The visualization includes labeled axes, a chart title, and interactive tooltips that reveal each point's horsepower value on hover. Built with D3.js v4, the example uses `d3.scaleLinear` for axis scaling, `d3.axisBottom` and `d3.axisLeft` for tick marks, and SVG circles with mouse event handlers for the interactive data points.