A line chart tracks Bitcoin’s daily closing price over time, with a single steelblue path rising and falling across an SVG canvas. The x-axis encodes dates using `d3.scaleTime`, while the y-axis uses `d3.scaleLinear` for USD values. Data loads from a remote CSV, parsed with `d3.timeParse` and rendered via `d3.line` and `d3.axisBottom`/`d3.axisLeft`. The chart includes labeled axes for date and price, and handles malformed rows with the `defined` method.