The y-intercept of a graph is where the graph of the function intersects the y-axis. This means that the x-coordinate of the point is zero. To find the y-intercept of a line, when given the equation of the line, substitute (0) in for (x) and solve the equation,
y = x - 5
x = 0
y = 0 - 5
y = -5
This gives the resulting point of (0, -5) for the y-intercept of the line.
