Line Chart Accessibility

The practice of making line charts and graphs perceivable and understandable by people with visual impairments through alternative representations such as tactile graphics, sonification, speech descriptions, or multimodal interfaces. Accessible line charts must convey not just individual data points but also trends, slopes, intersections, extrema, and relationships between multiple data series — information that sighted users grasp visually but that requires careful non-visual encoding for blind users.