No...
whenever you have an exponent on your varaible your graph is not liner. this is a parabola.
x times x = 25 x = 5
Linear.
-2
No.
Yes.
no, because xx=x squared, and x squared is not linear
If you already know that x = -3 and y = 5 what linear equations are you wanting to solve?
Yes.
Yes.
No, it is is a single point.
-3
No, it is not.