Question

What is the range of the function y = x^2?

all real numbers
x ≥ 0
y ≥ 0

Answer 1

the third one y >=2 Any number squared is greater or equal to 0, and there is no restriction on the domain in the problem's statement(x could be any real number, less or greater or equal to 0)

Answer 2

No. x is part of the domain, and y is part of the range, so you want to find y's possible values(not x).

Answer 3

so the third... y ≥ 0

Answer 4

Oh yeah, sorry y >= 0. I don't know where that 2 came from. :)