16-4=12
12x5=60
I'm putting together assumptions as this isn't really clear to me, I apologize.
        
             
        
        
        
Answer:
could it be as simple as x+1=y or y-1=x?
Step-by-step explanation:
y is all of x plus one more.....
 
        
             
        
        
        
The y-intercept should be closer to ten. 
        
                    
             
        
        
        
Answer:
Option C.
Step-by-step explanation:
This is a function because all of the numbers have a partner, and none of them have more than one. 
                                     Example of Not a Function
Function                                Not a Function
-4 to 5                                      <em> -4 to 5</em>                             <
9 to 7                                       <em> -4 to 3    </em>                          <
13 to 3                                       13 to 3                              ^
-7 to 5                                        9 to 7                               ^
                                                  -7 to 5                               ^
                                            Not a Function because of this
 
        
             
        
        
        
Step-by-step explanation:
Discount amount = discount%of marked price
 = 20% of 250
 = 20/100x250
 =Rs 50