A-Best: I would just raise the number to 1/3. Be sure you put parentheses around 1/3 or else the calculator will not give the correct answer.
If you wanted to graph y = cube root (x), then you would type on your calculator.
y = x^(1/3)
If you don't use parentheses, then the calculator would interpret y = x^1/3 to be y = x/3.
