Hey there 
That's easy 
Divide 2750 by 40 and a good estimate would be 68 dollars 
Hope this helps
        
                    
             
        
        
        
Well idk about geometric theorem or how ever. but, because they have the same line aka the same Slope. The other line is parallel to it. Assuming by the statement, -1/3x has another -1/3x of the same Slope.
        
             
        
        
        
Domain sets values and Range is the difference between the highest and the lowest numbers.
        
             
        
        
        
Hmm, I believe the answer is 80%. 
It is a decrease.
30 - 6 = 24. 
24/30 = 80% decrease from Wednesday.