This multi-line chart tracks monthly spending across three categories—food, transport, and entertainment—using a CSV dataset. Rendered as SVG paths and circles, it employs the reusable `multiLineChart()` function with D3's `scalePoint`, `scaleLinear`, and `scaleOrdinal` for axes and color encoding. Axis labels, a bold title, and an interactive legend clarify the trends. The chart is built with D3 v7, loading data via `d3.csv` and appending SVG elements.