Answer:
<h2>-6</h2>
Step-by-step explanation:
When an equation is written in slope intercept form, which is y = mx + b, m is the slope and b is the y-intercept. In this case, the equation is y = -6x - 9, m is -6, and b is -9. Hence, if m = -6, then our slope is also -6.
Hope this helps :)
<em>PLEASE MARK BRAINLIEST</em>