Help me out please I’m really lost

Answer:
F(4)=5
Step-by-step explanation:
F(x)=y is a function
You have points (x, y)
Fill in the appropriate points into the function
Answer:
f(4)= 5
Step-by-step explanation:
(4,5) means 4= x-coordinate and 5= y-coordinate: (x,y)= (4,5)
f(x)=y, so f(4)= 5 is the right option