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Identify the variables, constants, terms and number of terms in each of the following expressions:
 
(I) 17+y 
 
(II) 18+17x
 
(III) 19y+9x+17
 
(IV) 6+18y+19x
 
S.NoExpressionsVariablesConstantTermsNumber of terms
 (I) 17+y   ,
 (II) 18+17x   ,
 (III) 19y+9x+17 ,   , ,
 (IV) 6+18y+19x ,   , ,