This interactive scatterplot visualization compares Airbnb listing attributes across selectable European cities and weekdays/weekends. Users can choose which numeric attributes to map to the X and Y axes—with the Y axis always displayed on a logarithmic scale—and apply a minimum-value filter via a slider. The visualization renders density-based color gradients within vertical bands for each X-axis category, using D3.js (d3.scaleLinear, d3.scaleBand, d3.scaleLog) for scaling and axis rendering, and React for the interface controls. City-specific CSV data is loaded from GitHub, and the density calculation uses a 5% window of the Y-axis range to aggregate point distributions.