2.998 correct me if wrong
Answer:
2
Step-by-step explanation:
From the graph, we obtain the trigonometric function as:

The corresponding cosine function have equation.

This function is of the form: 
where
is the amplitude.
Therefore the amplitude is |2|=2
The third choice is correct
5000 is 1/100 of the value of 500,000
I beleive it is a because both variable could change