This example demonstrates how varying the beta parameter of d3.curveBundle alters the shape of a line connecting four fixed points. Seven paths are rendered as SVG elements, each using a different beta value from 0.4 to 1.0, with opacity increasing proportionally to the beta index. The d3.line generator applies the selected curve function to the same point array, producing a family of curves that gradually transition from a tight, angled path to a smoother, more rounded one. The visualization highlights the sensitivity of bundle curves to their tension parameter.