Final answer:
The y-intercept of the line y = x - 3 is -3.
Step-by-step explanation:
The y-intercept of a line is the point where the line crosses the y-axis, which is the vertical axis in a coordinate plane. In the equation y = x - 3, the y-intercept is the constant term, which is -3. This means that the line intersects the y-axis at the point (0, -3).
Learn more about y-intercept and linear equations