Pleaseee helppp I don't understand thissd

Very simple.
Let's say you have an equation.
f(x) = x^2
You are asked to find the value for y when x equals 1.
The new equation is: f(1) = (1)^2
f(1) = 1
When x = 1, y = 1.
The same concept is applied here.
In the graph, where does x equal 0?
It equals zero at the origin.
Is there any y-value associated with 0?
Yes, there is.
Y equals five when x equals 0.
So
h(0) = 5
Answer:
5
Step-by-step explanation:
Basically the h(0) or whatever number is in the parenthesis just means if h was a certain number, what would the output be?
So in the graph, you have points scattered all over the place. We will take the one right under the -7 on the x axis. That is saying if if h was -7, what will its output be? -7 is the domain or the x value, and the output would be the range or the y value, which in this case is -2. I hope this helps!