Answer:

Step-by-step explanation:
When you have something like that, just think that the first number goes on top and the second number goes on bottom.
 
        
             
        
        
        
Answer:
third one is a required answer.
x =2y
or
1/x=y
 
        
                    
             
        
        
        
A constant is any number, anywhere on the number line.
A variable is an unknown, x y z n etc
        
                    
             
        
        
        
Answer:
should be 0.28125
Step-by-step explanation:
 
        
             
        
        
        
Answer:
b
Step-by-step explanation:
vertical line through x at one
vertical lines have undefined slopes
can take two points to verify  (1,1)  (1,2)    m=<u> 2-1</u>
                                                                          1-1   
                                                                        <u>   1 </u>
                                                                           0         undefined zero in denominator