This interactive scatter plot visualizes automotive data from the UCI Machine Learning Repository’s Auto MPG dataset, mapping weight on the y-axis against a user-selectable x-axis column via a dropdown menu. A dropdownMenu module updates the x-axis label and scales on selection. Using D3 v5 with SVG rendering, the code employs scaleLinear, extent, axisLeft, axisBottom, and selectable circle elements to display each car as a semi-transparent point.