1. The problem statement, all variables and given/known data A point charge of -8 µC is at the origin. What is the electric potential at (a) (3.0m, 0), (b) (-3.0m, 0), and (c) (3.0m, -3.0m)? 2. Relevant equations V=kq/r 3. The attempt at a solution a & b) V=(8.99x10^9)(-8x10^-6)/3 V= -23973.3 c) V=(8.99x10^9(-8x10^-6)/6 I understand part a and b and got the correct answer. However, for part c, the only thing I am doing different is r=6 instead of 3 because the coordinates are (3.0m, -3.0m) and I am not getting the correct answer. I don't really understand. Thank you.