Question

Which of the following functions best represents the graph?

f(x) = (x + 3)(x − 3)(x − 9)
f(x) = (x + 3)(x − 3)(x + 9)
f(x) = (x + 3)(x − 3)(x − 1)
f(x) = (x + 3)(x − 3)(x + 1)

Answer 1

f(x) = (x + 3)(x − 3)(x − 1)

Explanation:

The roots are at -3, -1 and 3 therefore the 3rd option is correct.

Answer 2

The answer is D

Explanation:

Attatched photo for proof