Answer:
n=-6 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Y=-2
Step-by-step explanation:
You would use the vertex form to find the directrix
 
        
             
        
        
        
Answer:
Guess I'll agree with the other person.
Step-by-step explanation:
 
        
             
        
        
        
THe amplitude is half of the distance from the highest and lowest phase of the wave..
4-(-1)=5
0.5*5=2.5
amp=2.5 units