Question

y=1/x

A.
all real numbers

B.
all real numbers except 0

C.
all positive numbers

D.
all negative numbers

Answer 1

Is this all the information the problem gives you?

Answer 2

Range or domain?

Answer 3

^That too.

Answer 4

Range

Answer 5

If it's asking for domain, all real numbers except for zero.
For range, also all real numbers except for zero.

Answer 6

So now that you've told her the answer it could be a good idea to explain why, then next time she can figure it out alone and take less time than this takes.

Answer 7

Alright ...
(1/x) can take nonzero number.
To make this very negative, simply put in a very close-to-zero but negative x.
To make it very positive, simply put in a very close-to-zero but positive x.
To make it near zero, simply put in a very positive or very negative x.
But no matter what x you put in, you will never get zero. There are asymptotes at both x = 0 and y = 0.