F(x)=-6x+9
g(x)=6x-17
Opposite slopes, so perpendicular.
neither of them
https://www.desmos.com/calculator/dcqgcmpvfi
WAIT
It is reciporcal,not opposite.. right? IDK, haven't done this in 3 years.
it ok the slope of perpendicular \(- \frac1m\)
f(x) = -6x + 9
g(x) = 6x - 17
These lines are neither parallel or perpendicular
Here's a graph to show this : https://www.desmos.com/calculator/eqamgrdkuc
+2592 
