Question 284101
Distance is always positive.  If a direction is also specified, that might be considered positive or negative, but distance is a measure of how far apart 2 points are.
-------------
y = 2 is parallel to the x-axis, and 2 units "above" it.  The distance from a point to a line is the minimum distance, which is from the point and perpendicular to the line.  In this case from (0,0) to (2,0).
-------------------
The distance is 2.