Cars Scatter Plot
A scatter plot displays demographic data for California counties from a CSV file, with a dropdown menu to select which numeric column drives the x-axis while counties appear on the y-axis. Each circle represents a county, animated with a staggered 2-second transition. The visualization uses D3 v5 with `scaleLinear`, `scalePoint`, `axisBottom`, `axisLeft`, and `transition().delay()` to move circles from the center to their final positions. Data comes from the UCI Machine Learning Repository’s Auto MPG dataset, though the plot itself shows county-level population and socioeconomic variables loaded via `d3.csv`.