Given:
Equations of two lines are
To find:
Whether the lines are parallel, perpendicular, or neither.
Solution:
Slope intercept form is
where, m is slope and b is y-intercept.
The first equation is
So, on comparing with slope intercept form, the slope of this line is 1/2.
The second equation is
On comparing with slope intercept form, the slope of line is 2.
Slopes of parallel lines are equal.
Slopes of perpendicular are opposite reciprocals.
Given lines are neither parallel nor perpendicular because their slopes are not the same and not opposite reciprocals.
Therefore, the correct option is D.