 
       
      
    The given graph is a representation of kinetics of a reaction

The  and 
 axes for zero and first order reactions, respectively are
zero order (y= concentration and x= time), first order (y= rate constant and x= concentration)
 
zero order (y=rate and x=concentration), first order ( and x= concenration)
 
zero order (y= rate and x=concentration), first order (y= rate and )
 
zero order (y= concentration and x=time),first order ( and x= concentration)
 
                
                  As we have learnt,
For a zero order reaction,
 rate = K = constant.
 rate is independent of concentration
For a first order reaction
 Half life is independent of concentration
Hence correct option is 2
 
                