What is the frequency of the sinusoidal graph?

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Step-by-step explanation:

We can see that the given graph is represented by the function .

Now, we know that period of the is .

Also, in a sinusoidal model of the form , the period is given by .

Since, the given graph models the function .

Its period is given by .

Further, the frequency of a sinusoidal model is given by the reciprocal of its period.

Thus, the frequency of this model is .