This is an equation where the variable is raised to the first power and the variable does not occur in the denominator, inside an absolute value symbol, or under a square root symbol. it is a equation.

I would say linear because it fits those requirements. An example of a linear equation could be y= x +1 and the variable is raised to the first power so it is its own self, it's variable is not in the denominator, absolute value symbol, nor a square root symbol.