Hello!!
You can always put simple values like 0, 1, 4 for x to graph these kinds of functions. You should always evaluate some values for the x value so that you can have enough data to generate a graph. Instead of waffling here, I believe illustrating will be better for your understanding. I added a screen shot of the cube root function. Square root function’s graph will be in the same shape but it’s domain will only be x>=positive infinity whereas for square root the domain is negative infinity=Hope this helps! Please ask any questions if this wasn’t clear I am so sorry!! :)