1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution The shaded area is a triangle so the area of a triangle for this particular graph is this: 0.5 (Stress)(Strain) which gives: 0.5(F/A)(e/L) so the top would give work done and the bottom would give volume but we're still left with 0.5 in front of this so the answer should be A yet the answer is B? Why has the half disappeared?