Question

What is the range of f(x) = |-x|? y ≤ 0 y ≥ 0 y = 0 all reals

Answer 1

y≥0

Explanation:

no matter what is written inside it,

|x|≥0

so here

f(x)≥|-x|

so

f(x)≥0

then

y≥0