1. The problem statement, all variables and given/known data Set up sums of integrals that can be used to find the area of the region bounded by the graphs of the equations by integrating with respect to y. y= sqrt(x) y=-x x=1 x=4 2. Relevant equations ∫[f(x) - g(x)] dx 3. The attempt at a solution I did: ∫ (from 1 to 4) [sqrt(x) + x] dx and worked it out to get 73/6, but my friend said I'm doing it backwards and doesn't want to explain. If anyone could tell me what I'm doing wrong, I would be grateful.