The independent variable is: 
cold coffee
because: just an educated guess
sorry this is a little hard but i hope this helps
        
             
        
        
        
Answer:
4/7
Step-by-step explanation:
 
        
             
        
        
        
Its 1+20x because you would subtract 2-1-=1 and 35x-15x=20x im sorry this is the real correct answer
        
                    
             
        
        
        
Answer: Rachel's prediction is faster than the actual unit rate, and Theadore's prediction is slower.
 
        
                    
             
        
        
        
Answer:
See image below:) 
Step-by-step explanation: