Question

Question 1 of 5

Select the correct answer.
Which function has a domain of (-♾, ♾)and a range of (-♾, 4)?

PLEASE HELP

A: f(x) = -x^2 + 4

B: f(x) = 2^x +4

C: f(x) = -4x

D: f(x) = x + 4

Answer 1

Answer: A

Explanation:

A) Correct.
`x^2 \geq 0 \implies -x^2 \leq 0`

B) Wrong.
`2^x > 0`, so the range is
`(4, \infty)`

C) Wrong. Linear functions have a range of all real numbers.

D) Wrong. Same logic as C.