That is not an equation because there is no equal sign. In order for y to be a function of x, y must equal the rest of the values. So assuming that your expression was equal to 0. To make y a...
It depends on the domain of y. If that is restricted to non-negative values, then the answer is yes. But if y is allowed to be negative, then the answer is no because then there are two values of y...
Both. If you look at it like this: y=41-x you say x is independent and y is dependent of x (i.e. y is a function of x) For x=41-y you say y is independent and x is dependent of y (i.e. x is a...