Answer:
slope is 0, line is horizontal
Explanation:
First we will have to find the slope
Slope is equal to: y2-y1/x2-x1 (rise/run)
So let's label the points
(3,-6), (6, -6)
x1=3
y1=-6
x2=6
y=-6
now plug those into the equation
-6-(-6)/6-3= 0/3=0
since the slope is equal to 0, that means the line is horizontal
If you're confused, maybe the included attachment might help.
Hope this helps!