1. The given equation of the line is in the slope-intercept form: y = mx + b where m is the slope and b is the y-intercept.
2. In the given equation y = -8x - 9 , identify m = -8 .
3. The slope of the line is -8 .
4. Identify b = -9 for the y-intercept.
5. The y-intercept of the line occurs where x = 0 .
6. Substitute x = 0 into the equation: y = -8(0) - 9 = -9 .
7. The y-intercept is (0, -9).
8. Answer: \text{slope} = -8 and y-intercept (x, y) = (0, -9)