From an AP Calculus BC exam guide book:
Use Euler's method with step increment h=0.1 to approximate y(0.3), where y(x) is the solution to the IVP y'=y+xy, y(0)=1.
We think the answer is (C) 1.37. The answer key says the answer is (E) 1.54. I think the book gave the answer for y(0.4). Are we right? Is the book?
PS. Answers A,B, and D are: 1.221, 0.1, and 1.1.
Edit: OK, some more detail: