Answer:
-8
Explanation:
originally you would be looking at f(x).
Then you say that x=5 because you are looking for f(5).
Now, you are given 4 points. Look for which one has 5 in the x. Remember (x, y).
The last one (5, -8) is the one you are looking for because 5 is in the x. So what you get out after you put 5 in the function is -8 (which is your y).
Note: x is your input and y is your output.
Another way to look at this is by putting it in a table:
x y
-4 -2
-1 5
3 4
5 -8
To shorten it, when you plug 5 into x, you will get -8.