Final answer:
The amplitude of the wave is 6.5.
Step-by-step explanation:
The amplitude of a wave is the maximum displacement from the equilibrium position. In this case, the midline of the wave is at y=3.3 and the peak is at (-2π, 9.8). The amplitude can be found by subtracting the midline value from the peak value:
Amplitude = peak - midline = 9.8 - 3.3 = 6.5
Therefore, the amplitude of the wave is 6.5.