Cars Scatter Plot
This scatter plot visualizes the relationship between horsepower and weight for cars, using data from the UCI Machine Learning Repository’s Auto MPG dataset. Each red, semi-transparent circle represents a car, with its position determined by horsepower on the x-axis and weight on the y-axis, both scaled using `d3.scaleLinear`. The code loads the CSV data with `d3.csv`, parses numeric fields, and renders axes via `d3.axisLeft` and `d3.axisBottom` with tick marks. SVG circles are appended to the chart, and labels for axes and title are added using D3’s selection methods.