Hi there!
So first off, here are little definitions you need to know in order to be able to answer your question :
<u>Constant</u> means that the rates of change are the same.
<u>Variable</u> means that the rates of change are different.
But from what I can see, you don't even need those definitions because you got both answers right! 
Continue your great work! If there's anything just let me know! :)
 
        
             
        
        
        
I believe that it's A neither, because I don't think that it could be displayed on a coordinate graph when it has an exponent in it. So I think it's A. Let me know if I'm correct. ;-)
        
                    
             
        
        
        
Answer:
<u>x = -4/3</u>
Step-by-step explanation:
3x + 4 = 0
3x = -4
<u>x = -4/3</u>
 
        
                    
             
        
        
        
For x, the answer is x >= -(3 - y)/2, for y it's y <= 2x -3.
        
             
        
        
        
Answer:
80 ounces
Step-by-step explanation:
There are 16 ounces in a pound. So to convert from pounds to ounces, you multiply 5 by 16, which is 80.