Use the y-intercept formula: set x = 0
Substitute x = 0 into the equation
Solve for y
The value of y is the y-intercept
If the equation is in slope-intercept form y = mx + b, the y-intercept is b
If the equation is in standard form Ax + By = C, set x = 0 and solve for y
If you have a graph, find where the line crosses the y-axis
The y-axis crossing point has x = 0