This interactive scatter plot visualizes the relationship between the U.S. Federal Funds Rate and the U.S. Inflation Rate over time, with each point representing a yearly observation. The chart uses React state to manage a custom tooltip that displays the year, rate type, and value when a user hovers over an individual point. The visualization is rendered as an SVG using D3 v5’s `scaleLinear`, `extent`, and `min`/`max` functions for mapping data to coordinates. The data originates from a remote CSV file, processed with D3’s `csv` parser to filter incomplete records before plotting.