text: y = |3 - x| means\n\ny = 3 - x for 3 - x ≥ 0 ie x ≤ 3\nand y = - (3 - x) for 3 - x < 0\n= x - 3 for x >3\n\nThis would be the parts of two lines y = 3 - x and y = x - 3 that would always be on or above the x-axis and they would meet in the point of a V at x = 3\n\nx = |3 - y|\nSo x = 3 - y for 3 - y ≥ 0\nie y = 3 - x for y ≤ 3\nand x = -(3 - y) for 3 - y < 0\nie y = x + 3 for y > 3\n\nSo x = |3 - y| is the same as:\n\ny = 3 - x for y ≤ 3\n= x - 3 for y > 3