Answer:
2
Step-by-step explanation:
Take the absolute value of the lowest y value.
So

Take the absolute value of highest y value.

Add those two together and divide by two.

So the amplitude is 2
If $1 is 5%, 100% would be $1 times 100/5= $1 times 20 = $20
Answer:
30
Step-by-step explanation:
62 = 2x+2
62-2 = 60
60/2 = 30
5/38 is 0.13 because you have to divide them