We can use the points in either order and you will still get the same slope. I usually solve in order that is given. So the first coordinates I label (x1,y1) and the second is (x2,y2).
Slope=m=(y2-y1)/(x2-x1)
 m=(9-5)/(3-1)=4/2=2
Slope is 2.
        
                    
             
        
        
        
Answer:
49950
Step-by-step explanation:
111% of 45000 is 49950
 
        
                    
             
        
        
        
Answer:
k = -9
Step-by-step explanation:
When a number (coefficient) is next to a letter (variable) that means you multiply. To solve you would to the opposite, which is to divide. 
-126 ÷ 14 = -9
So -9 is equal to k. 
Hope that helps and have a great day!