Question

What are the domain and range of the real-valued function f(x)=2/3x?
A. The domain is all real number except 0. The range is all real numbers except 0.
B. The domain and the range are all real numbers.
C. The domain is x>0. The range is f(x)>0.
D. The domain is all real numbers except 0. The range is all real numbers

Answer 1

If your function is (as written) ...

... f(x) = (2/3)x

Then B is the correct answer.

_____

If your function is ...

... f(x) = 2/(3x)

Then A is the correct answer.