Question

Use the image to answer the question.

A curve is plotted on a coordinate plane. The curve begins in quadrant 2 and rises and descends multiple times, intersecting the x-axis at four points.

Write the equation of the periodic function based on the graph.

(1 point)
Responses

y=−3cosx
y=−3cosx

y=3cosx
y=3cosx

y=−13cosx
y=−13cosx

y=−3sinx
y=−3sinx
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Answer 1

y = −3 cos x