Below is the graph of a trigonometric function. It intersects its midline at $(-3.5,-0.8)$, and it has a maximum point at $(4.1,0.7)$. What is the amplitude of the function?

Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: Below is the graph of a trigonometric function. It intersects its midline at $(-3.5,-0.8)$, and it has a maximum point at $(4.1,0.7)$. What is the amplitude of the function?

Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: Below is the graph of a trigonometric function. It intersects its midline at $(-3.5,-0.8)$, and it has a maximum point at $(4.1,0.7)$. What is the amplitude of the function?
