No, f(x) = x + x^5 in not linear.
No, f(x) = x + x^5 in not linear.
Only if it's a function.
No, it is not.
If you mean: y = 2x+5 then yes it is a linear function of straight line
No.
The linear equation x=5 or any other number is a vertical line. There are more than one possible answer for y. Therefore it is not a function.
It is a linear equation in x. It has a solution, which is x = -5
It is a linear equation in x. The equation has the solution x = 0.
If you mean: y = 2x+5 then it is a straight line equation.
Y = 2x-5 and Y = 2x plus 7 is a linear system which intersects at points (-2,2)
It is a linear equation in one variable, x.
Indeed, these two equations are the same - because addition is a commutative function.