This interactive line and area chart visualizes the monthly USD to INR exchange rate over time. The visualization combines a semi-transparent steelblue area chart with an overlaid line, both colored green, to show the trend. It includes axes labeled "Date" and "Exchange Rate (INR per USD)", plus a tooltip that appears on mouseover, revealing the exact exchange rate at the hovered date via a red focus circle. Built with D3 v7, the code uses `d3.area`, `d3.line`, `d3.scaleTime`, `d3.scaleLinear`, `d3.axisBottom`, `d3.axisLeft`, and `d3.bisector` for interactivity, with data loaded from a CSV file via `d3.csv`.