Good(X): 1,2,3,4,5 (increasing)
Good(Y): 12,8,5,3,2(decreasing)
"Marginal rate of substitution (MRS) of X for Y will go on diminishing." I have a question on this sentence that is according to Good(X) and Good(Y) it is clearly seen that Y is decreasing or diminishing and X is increasing but the sentence tells 'MRS of X will go on diminishing' what is this? Could you please tell me on what basis and how can we say X is diminishing?