The given equation is \( y = -5x \).
In the slope-intercept form of a linear equation, which is \( y = mx + b \):
- \( m \) is the slope,
- \( b \) is the y-intercept.
Comparing your equation \( y = -5x \) to the slope-intercept form:
- The slope (\( m \)) is \(-5\).
- The y-intercept (\( b \)) is \(0\) (since there is no constant term).
Thus, the slope is \(-5\) and the y-intercept is \(0\).