We have the following expression

This is equivalent to

Since

we have that

Therefore, the answer is the second option from top to bottom.
 
        
             
        
        
        
Answer:
C
Step-by-step explanation:
Any value of x makes the equation true.
 
        
             
        
        
        
Answer:
-1/3
Step-by-step explanation:
Slope is defined as "rise over run". If you count out the units, you should be able to see that your rise is 1 and your run is 3 and is pointing downward, so your answer is -1/3.
Alternatively you could use Slope Formula: 
 
        
                    
             
        
        
        
Answer:
k=-1
Step-by-step explanation:
-2=k. 2
Diving whole equation by 2
-2/2=k
k=-1