Answer:
y = 4; g(7) = 4
Step-by-step explanation:
The meaning of g(7) is wherever you see an x in g(x) you put a 7. In this case you are being told that x = 7
So go to 7 on the x axis, go up until you hit the blue line which is g(x) and then read what it says on the y axis. It shows 4 and that is your answer.
 
        
             
        
        
        
I hope this helps you 
x=2 
f (2)=(2+1)^2=3^2=9
        
                    
             
        
        
        
 If you mean log, then 1.556303