1. y = -1/2 + 2.
2. y= 2/5x - 4/5
        
             
        
        
        
Answer:
The groups walking speed is  or
  or 
Step-by-step explanation:
we know that
To find the speed divide the distance by the time
so

Convert to mixed number

 
        
             
        
        
        
A) 42x-12
 6*7=42. 6*2=12
b) 21y
 11+4+6=21
        
                    
             
        
        
        
I think the answer is b I havent done problems like that in like 2 years i hope i helped