The "x-value" refers to a specific point on the horizontal axis of a graph, typically representing an independent variable in a mathematical function or equation. In a coordinate system, the x-value helps determine the position of a point by indicating how far along the horizontal axis it is located. In the context of algebra, the x-value is often used to solve equations or to find the roots of a function, where the output (y-value) equals zero. Understanding x-values is essential for graphing functions and analyzing relationships between variables in various fields, including mathematics, science, and economics.