Originally Posted by

**Ackbeet** The numbers you've gotten by plugging into the function are incorrect. Calculators are going to have trouble plotting this function, because of the algorithm they use to plot. I believe it's some sort of exponential or logarithmic algorithm. Obviously, your function is defined for all real numbers. You'll have to plot $\displaystyle (x^{2})^{1/3}$ to get a correct picture on some calculators. Plugging in -2 does not give me -1.58. Try again, with the formula I just gave.