It is substitution. Because you are substituting 3=y into x+5=3
<h2>i cant answer it without text sorry. i just cant see the question :(</h2>
What makes no sense I don't get it what it means plus look it up if can
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