Answer:
Perpendicular
Step-by-step explanation:
Linear equations will describe parallel lines when the lines have the same slope. These equations are written in slope-intercept form, so we can easily determine that the slopes are ...
f(x): slope is 5/6
g(x): slope is -6/5
These are not the same, so the lines are not parallel.
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The lines will be perpendicular when the product of their slopes is -1. Here, that product is ...
(5/6)(-6/5) = -30/30 = -1
These equations describe lines that are perpendicular.
x+(-7) or (standard form) 
x+y=-7
