Is #y=1# a linear function?
Yes, it is linear.
There are five conditions which must be met in order for an equation or function to be linear.
1) No variable can have an exponent other than the understood
2) No term can have more tan one variable.
3) No variable can be part of the denominator of a fraction.
4) No variable can be inside absolute value lines.
5) No variable can be part of a radicand.