The given points are:
(3,3) which can be represented as (x1,y1)
(0,-6) which can be represented as (x2,y2)
The slope of the line can be calculated using the following rule:
slope = (y2-y1) / (x2-x1)
Substitute with the given points in the above equation to get the slope as follows:
slope = (-6-3) / (0-3) = -9 / -3 = 3
Based on the above calculations:
slope of the line = 3