1. The problem is to find the x-intercept of a line when the y-intercept is given as -4. 2. The y-intercept is the point where the line crosses the y-axis, so the coordinates are $(0, -4)$. 3. The x-intercept is the point where the line crosses the x-axis, so at this point, $y=0$. 4. To find the x-intercept, we need the equation of the line. If the equation is not given, we need more information such as the slope or another point. 5. Assuming the line equation is in slope-intercept form: $$y = mx + b$$ where $b$ is the y-intercept. 6. Since $b = -4$, the equation is $$y = mx - 4$$. 7. To find the x-intercept, set $y=0$ and solve for $x$: $$0 = mx - 4$$ $$4 = mx$$ $$x = \frac{4}{m}$$ 8. So the x-intercept depends on the slope $m$. Without $m$, the exact x-intercept cannot be determined. 9. If you have the slope or another point, please provide it to find the exact x-intercept.