|x−y| =|y−x| (|x−y| = |y−x|= distance between x and y)
|−x−(−y)|
|−x−(−y)| is the distance between -x and -y, which is 9 units.
If X = -3 and Y = -4 are two perpendicular lines. Point P (-3, 1) lies on the line X = -3. Find the perpendicular distance(in units) from the point P to the line Y = -4.
Find the points on the x - axis, where distances from the line x3+y4=1 are 4 units.