Answer: 
a = 9 / 7
step by step explanation: 
 9 / - a + 15 = 8
Determined the defined range
9 / ( - a ) + 15 = 8 , a ≠ 0
subtract 15 from each side
9 / - a + 15 - 15 = 8 - 15
calculate the difference
 9 / - a = - 7 
multiply both side of equation by - a
9 / - a × - a = - 7 × - a
9 = 7 a
divide each side by of equation by -7
9 / 7 = 7 a / 7
9 / 7 = a 
swap the side of equation . ( optional )
a = 9 / 7
 
        
                    
             
        
        
        
The is (5000,59) and you can check this by doing this -0.004(5000)+79
        
             
        
        
        
Answer:
A. Half of
B. Twice
C. greater than
Step-by-step explanation:
The median of the box plot is the middle line of the box, so for set a it is approximately ten and for set b it is approximately 20. 10 is half of 20 and 20 is twice as much as 10.
Hope this helps