Set x = 0
Substitute x = 0 into the equation
Solve for y
The y-intercept is the point (0, y)
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 the equation is a graph, find where it crosses the y-axis