Answer:
So first solve the equation given
X+2y=-14
-x -x
-----------------
2y=-x-14
---- ---------
2 2
y=- 1/2x-7
this would be your parallel line equation because y=-1/2x-7
Parallel lines have the same slope
Perpendicular lines have a negative reciprocal slope (so -2 would be positive 1/2)
Hope this helps!
Please leave a comment if I made a mistake, I will correct it!