Answer:
slope = -3
Explanation:
Slope formula:

Given points: (2, 0), (6, -12)
(2, 0) = (x1, y1)
(6, -12) = (x2, y2)
To find the slope, input the two given points into the formula used to find slope:

Simplify:
-12 - 0 = -12
6 - 2 = 4

The slope of the line is -3.
Hope this helps :)