1. The problem statement, all variables and given/known data You have to graph f(x) = x3 - 2x2 + x and find where the instantaneous rate of change is positive negative and zero. 2. Relevant equations 3. The attempt at a solution I factored this and found the zero's to be x= 0 and x = 1. With all this info given I graphed it and realized the EIRC is zero at 1 however it's also at 1/3 but I am unsure of how to obtain 1/3???