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# Wave Equation from a Graph: $y$ vs $t$

APPH12-O8GNAX

Consider the wave shown in the image below. Which of the following wave equations describes this wave? Assume $x$ $=$ $0$.

A

$y(t)=6.0\cos ( 8\pi t)$

B

$y(t)=3.0\cos (8\pi t)$

C

$y(t)=3.0\cos (4\pi t)$

D

$y(t)=6.0\cos (4\pi t)$