Question

Need help ASAP!!!!

The graph below shows three functions:

Which function has all real numbers as it’s domain?

Only f(x)
Both g(x) and p(x)
Both f(x) and g(x)
Only p(x)

Answer 1

The answer is "Only p(x)."

Explanation:

Took the test

Answer 2

Visibly, the functions g(x) and f(x) have restricted domains, while p(x) seems to go on infinitely.  The answer is "Only p(x)."