ShmoopTube

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For a good time, solve this shmoopy question.

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Which is the equation of the graph below?

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And here are the choices:

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What we have here looks like a sin curve, since its initial portion moves through the

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origin (0, 0). That leaves us with the first three answer choices.

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Next, for the amplitude, the graph moves three up and three down, so it's... 3. Simple

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as that. We're down to answers B and C now. Finally, we have to take into account the

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period of the graph.

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The sin wave completes its first full cycle at π, which is twice

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as fast as a normal sin wave. That means that the coefficient in the parentheses

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should be 2. We have our match -- answer B.

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Now wave bye-bye to the wave...

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