Use the graph below to answer the question that follows:
cosine graph with points at 0, 1 and pi over 2, negative 5, and pi, 1
what are the amplitude, period, and midline of the function?
amplitude: 6; period: 2π; midline: y = −3
amplitude: 6; period: π; midline: y = −3
amplitude: 3; period: π; midline: y = −2
amplitude: 3; period: 2π; midline: y = −2