11. f(x) = 3
Domain:
Range:
x-intercept:
y-intercept:

Domain: Domain of the expression is all real numbers except where they expression is undefined. I’m this case, there is no real number that makes the expression undefined. Therefore, (-infinite, +infinite) is the correct answer.
Range: y=3 is a straight line perpendicular to the y-axis. So it will be y=3
x-intercept: None
y-intercept: (0,3)