Rovnice nepřímé úměrnosti

 y =
A [10, 16]                                                                                                                                   
      x , y  
                                                                                                                                                 
y =                                                                                                                            
16 =                                                                                                                  
  neleží                                                    
B [6, 10] 
     x, y 

y =  
10 =         
10 = 10 leží   

C[4, 12]  
    x, y    
 
y =       
12 =   
1215 neleží
D [12, 5]
      x, y
y =
5 =
5 = 5 leží