Difference between Static methods and Instance methods

Question

I was just reading over the text given to me in my textbook and I\'m not really sure I understand what it is saying. It\'s basically telling me that static methods or class

Answer 1

If state of a method is not supposed to be changed or its not going to use any instance variables.

You want to call method without instance.

If it only works on arguments provided to it.

Utility functions are good instance of static methods. i.e math.pow(), this function is not going to change the state for different values. So it is static.