Could someone explain how to get the correct answer when trying to find the f(X) and g(X) on a graph like this? Thanks!

Answer:
f(3) = g (3)
Step-by-step explanation:
graphically, we notice that the graphs of f and g intersect
at the point of coordinates (3 , 0)
Then
f(3) = 6 = g(3)
Then
f(3) = g (3)