Answer:
The slope is $0.35/min and it gives the cost per minute of the phone used. 
Step-by-step explanation:
We can model this situation with a linear equation of the form 

where  is monthly cost,
 is monthly cost,  is the number of minutes,
 is the number of minutes,  is the flat monthly fee, and
 is the flat monthly fee, and  is the slope of the equation, or in our case, the amount of money charged per minute.
 is the slope of the equation, or in our case, the amount of money charged per minute.
The slope  is
 is 

 ,
,
in other words, the phone company charges $0.5 per minute.
With the slope in hand, the linear equation becomes
 ,
,
and we can find the monthly fee  from that fact that for 300 minutes the cost is $131:
 from that fact that for 300 minutes the cost is $131: 

 .
.
Therefore, 

where the slope if the equation give the cost per minute of the phone used. 
 
        
             
        
        
        
Answer: B. f(x)=(x+4)(x-2)^2(x+3)
Step-by-step explanation:
 in the graph there's two negative x value and one positive x value
so the function should be in a form of f(x)= (x+a) (x-b)^2 (x+c)
the one with negative value has a square, (x-b)^{2}, because that's where the y = 0 (the point is hitting the (x,0))
 
        
                    
             
        
        
        
The slope is -10, I used a graph for this.
        
                    
             
        
        
        
1/9 x 12 is 4/3 or 1.333 repeated
        
                    
             
        
        
        
Answer:
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