This interactive scatter plot explores the relationship between PM2.5 air pollution levels and various socioeconomic indicators across Los Angeles County census tracts, using data from the provided CSV. Users select which income, poverty, or health insurance metric to display on the y-axis, while the x-axis remains fixed on particulate matter concentration. The visualization uses d3.scaleLinear for axes, d3.axisBottom and d3.axisLeft for gridlines, and transitions circles with staggered delays per data point. A dropdown menu built with D3’s selection API lets viewers swap variables, dynamically re-rendering the SVG.