What are the domain and range for 2(y-1)= - the square root of 1/3x-6

Answer 1

The domain is: [18,∞),{x|x≥18}
The range is: [0,∞),{y|y≥0}

Answer 2

Hmmm.

y = 1 - 1/(2√(3x-6))

I get a horizontal asymptote at y=1, with the range (-∞,1)