Regarding function g & f of (x), it is understood that we must see that we are given the value of (1) for the x-value.
Laying out the problem at hand, it is simply asking to find y if x is one.
By doing so, we can verify that the coordinates, if we follow the x-value, will bring us to the y-value of 3 (1,3), where the two arrows intersect.
Thus, the final answer of this problem will be three, as f and g of (x) relate to an identical point when x = 1.