This example visualizes the ages of Titanic passengers as a line chart, plotting each passenger’s age in sequence along the x-axis. The chart uses D3.js v7 to load CSV data from a GitHub-hosted file, parse the values, and render an SVG with scales, axes, and a line generator. The code employs `d3.csv` for data loading, `d3.scaleLinear` for both axes, and `d3.line` to draw the path, with axes appended via `d3.axisBottom` and `d3.axisLeft`. The rendering is entirely SVG-based, showing a simple yet effective use of core D3 DOM manipulation and data binding.