Answer:y is the variable
Step-by-step explanation:a variable is a letter in an algebraic equation or expression 
 
        
                    
             
        
        
        
A: 
An independent variable could be how long she works. (Well it's not really independent I guess... Sorta depends.)
A dependent variable could be how much money she makes, depending on how long she works.
B:
Umm, like:
(1, 7)
If 1 was how many hours she worked and $7 is how much money she made, and therefore x would be how many hours she worked and y would be how much total money she made.
(2, 14)
(3, 21)
C: An equation would be 7x = y.
        
             
        
        
        
Answer:
hi lol I need to type 20 characters
 
        
                    
             
        
        
        
Step-by-step explanation:
the answer should be 18