the amplitude of the graph is \nthe midline is y = \ndone

Explanation:

Step1: Find the maximum and minimum values

The maximum value of the graph is $y = 6$ and the minimum value is $y = 2$.

Step2: Calculate the amplitude

The formula for the amplitude $A$ of a periodic - function is $A=\frac{\text{max}-\text{min}}{2}$. So, $A=\frac{6 - 2}{2}=\frac{4}{2}=2$.

Step3: Calculate the mid - line

The formula for the mid - line $y = k$ of a periodic function is $k=\frac{\text{max}+\text{min}}{2}$. So, $k=\frac{6 + 2}{2}=\frac{8}{2}=4$.

Answer:

The amplitude of the graph is $2$. The midline is $y = 4$.