The y-intercept of a graph is the point where the graph crosses the y-axis. This occurs when the value of the independent variable (usually represented as \(x\)) is zero. In a linear equation of the form \(y = mx + b\), the y-intercept is represented by the constant \(b\).
To find the y-intercept, you can substitute \(x = 0\) into the equation and solve for \(y\). The resulting value of \(y\) at this point is the y-intercept. In graphical terms, the y-intercept is often noted as the point \((0, y)\).