find the amplitude of the sinusoidal function. simplify any fractions. amplitude =

Explanation:

Step1: Recall amplitude definition

The amplitude of a sinusoidal function is half the vertical distance between the maximum and minimum values.

Step2: Identify max and min

From the graph, the maximum value of the function $f(x)$ is $1$ and the minimum value is $- 1$.

Step3: Calculate amplitude

The vertical distance between the maximum and minimum is $1-(-1)=2$. The amplitude $A=\frac{2}{2}=1$.

Answer:

$1$