Answer:
x = 1
Step-by-step explanation:
Here is what you need to know:
f(x) represents the y-value.
The x in the parenthesis represents the x-value.
Another way to write f(x) = 1 is y = 1.
So now you are just finding the x-value for when y = 1. Looking at the graph, when y is 1 ( 1 on the y-axis), x has to be 1! This is because when you go up one, the only value that matches that point is 1!
Hope this helps :)
(sorry if my explanation was a bit confusing)
