This scatter plot shows the relationship between the Cost of Living Index and Local Purchasing Power Index for countries worldwide. Each circle represents a country, positioned by its cost of living on the x-axis and purchasing power on the y-axis. Circle color indicates the value ratio between purchasing power and cost of living, from green (good value) to red (very poor value), while circle radius reflects rank. The visualization uses D3’s `scaleLinear` for axes, and React manages state with click interactions that highlight selected countries, plus a tooltip showing country name and rank.