Question

The graph of a function f is shown below. Use the zeros and the turning points of the graph to find the rule for f.

A.
f(x) = x4 − 8x2 + 16

B.f(x) = −x4 + 5x2 − 4

C.f(x) = x3 + x2 − 4x + 4

D.f(x) = x4 − 5x2 + 4

Answer 1

Answer is D

Explanation:

Using the zeros of the graph we should have y=0 when we put x=-2, x=-1, x=1, x=2

Only the function on option D works, so the answer is D