The line y = 8 does not have a slope, so that means the equation of this line will also have no slope.
Now let's plug in (-6, 12) into the equation of a line, y = mx + b.
Plugging (-6, 12) into the equation, you get: 12 = 0(-6) + b
Now solve for b. 12 = 0(-6) + b
Now plug in 12 for b and 0 for m into the equation of a line, y = mx + b.
Your answer is: