Why aren't voluntary response samples usually representative of the population
       
      
                
     
    
    
    
    
    2 answers:
            
              
              
                
                
People who volunteer usually have a strong opinion so will not represent the opinion of the average person. 
Answer: C
 
                                
             
                    
              
              
                
                
Answer:
C: the people who volunteer usually have a motive to do so and will be the only ones represented
Step-by-step explanation:
In a voluntary response sample, only people who are motivated to respond usually respond.
Since they are usually the only ones that respond, they are the only ones that will be represented.
 
                                
             
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17/30 or .56 is your correct answer
        
             
        
        
        
Answer:
.25
Step-by-step explanation:
y2-y1/x2-x1
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