Use the image to answer the question.
A waveform graph is shown on a coordinate plane. The x axis is labeled in increments of start fraction pi over 6 end fraction, going from 0 to start fraction 2 pi over 3 end fraction. The y axis is labeled in increments of 2, going from negative 2 to 2.
Based on the set of points in the graph, determine the equation that would match the graph.
(1 point)
Responses
f(θ)=1.5cos(3θ)
y equals 1.5 cosine left parenthesis 3 theta right parenthesis plus 2
f(θ)=1.5cos(π3θ)
y equals 1.5 cosine left parenthesis Start Fraction pi over 3 End Fraction theta right parenthesis plus 2
f(θ)=1.5sin(3θ)
y equals 1.5 sine left parenthesis 3 theta right parenthesis plus 2
f(θ)=1.5sin(π3θ)