Answer:
No is something worng
Step-by-step explanation:
y= 9/8 * x - 1
 
        
             
        
        
        
Never because I had this question and saw it on khan
        
                    
             
        
        
        
Answer:
C
Step-by-step explanation:
15 times 2 is 30 
1 times 2 is 2 
Proportinal
Hope this helps
 
        
             
        
        
        
Answer:
-3mn
Step-by-step explanation:
It seems you might be missing some of the question, as you haven't given what m and n are equal to. 
If the question has just given you x, then you would simply just simplify it to get -3mn.