Answer:
-2
Step-by-step explanation:
x – 2y = 12
-2y = -x + 12
y = 1/2x - 6
Slope in above equation is 1/2. If you want the slope of a perpendicular line take the inverse opposite which makes it -2/1 or just simply -2.
Rewrite the equation with the perpendicular slope:
y = -2x - 6
