An HTML page displays a simple SVG line chart composed of three connected black line segments on a white background. The example demonstrates fundamental SVG rendering and CSS styling techniques, including both a `<style>` block and inline styles for colored headings. It uses the native SVG `<line>` element and properties like `stroke`, alongside JavaScript and CSS integration for basic page structure. The visualization serves as a bare-minimum starter for creating line charts without any external charting libraries.