1. The problem statement, all variables and given/known data Problem: Find the volume of the solid of revolution obtained by rotating the area bounded by the curves y = x^2 – 2 and y = 0 about the line y = -1. Consider only that part above y = -1. Solution: The solution is attached as TheSolution.jpeg. 2. Relevant equations Integration. 3. The attempt at a solution I get everything the solution did except for the part with the PQ = 1 - |y| = 1 - (-y) = 1 + y = y + 1. Could someone please explain that part for me? Any input would be greatly appreciated!