Answer:
The relationship between the circumference of a circle and its diameter represent  a direct variation and the constant of proportionality is equal to the constant 
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form 
where K is the constant of proportionality
In this problem we know that
The circumference of a circle is equal to

therefore
the relationship between the circumference of a circle and its diameter is a direct variation and the constant of proportionality is equal to the constant 
 
        
             
        
        
        
Answer:  30%
Step-by-step explanation:
Given : Patient has a 2500 cc bag of irrigation solution hanging.
Irrigation has been infused = 750cc
Then, the percentage of irrigation solution has been infused :

Hence, the percentage of irrigation solution has been infused = 30%
 
        
             
        
        
        
Less, 12 x 3/4 is 9 as you take 12/4 which is 3 times 3, which gives you 9
        
             
        
        
        
Answer:
B.
Step-by-step explanation:
(1,-8) sorry if you needed an explanation i am not good at that. Hope this helped!!