We can find slope 
with this formula
Where 
and 
thus
The slope of line is -1/2.
Hope this helps.
Answer: it;s D..........................
The <u>correct answer</u> is:
Line L must be perpendicular to both line O and line P as well.
Explanation:
Since N, O and P are all parallel, any line that intersects N will intersect O and P at the same angle. Since L is perpendicular to N, intersecting at a right angle, this means it must be perpendicular to O and P also.
Choice 1. f(5)=5-3 which equals 2
