Answer:
Function
Step-by-step explanation:
Put a vertical line through every point.
If the line goes through another point, then it is not a function.
This method is called the Vertical Line Test or VLT
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-Chetan K
 
        
             
        
        
        
Answer:
Randomly select 50 tickets from each zone and invite those guests to participate in the survey.
Step-by-step explanation:
I hope this helped
 
        
             
        
        
        
Answer:
Step-by-step explanation:
a
 
        
                    
             
        
        
        
Answer:
1.107   =  r
Step-by-step explanation:
To solve this for r, do the following:
Add 10 to both sides, to isolate the r term on the left:  18r^(-8) = 8
Divide both sides by 18, to isolate r^(-8):   r^(-8) = 8/18
Invert both sides:  r^8 = 9/4
Take the natural log or both sides:
8 ln r = ln 9 - ln 4, or 
8 ln r = 0.8109, so that ln r = 0.1014
to find r, raise e to the power ln r on the left and e to the power 0.1014 on the right:
   ln r           0.1014
e         =    e              =  1.107   =  r