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# Equation of a Sinusoidal Graph

ACTMAT-0O1XWY

Refer to the figure below.

Which of the following equations could represent the graph of this figure?

A

$f(x) = - \sin {8x}$

B

$f(x) = \sin \cfrac{1}{8}x$

C

$f(x) = \cos(\cfrac{8x-\pi}{2})$

D

$f(x) = \cos (\cfrac{1}{8}x - 2\pi)$

E

$f(x) = cos(8x-4\pi)$