This example visualizes Swedish municipal statistics, plotting the relationship between local tax rates and average income, with circle size encoding mean age. The scatterplot uses d3.scaleLinear for x- and y-axes and a third scale for bubble radius, rendered as SVG circles with axis ticks from d3.axisBottom and d3.axisLeft. A dropdown menu, built with a custom dropdownMenu function, offers three options though the selection is not connected to the data. Data is loaded from a CSV file using d3.csv, with numeric fields parsed for scaling.