Answer :

(a) Let as plot the graph as per the given table. It is shown as below



This graph follows y = 3x-1 pattern.


(b) The graph follows y = 3x-1 pattern.


If x = 3 then y = (3 ×3)-1 = 5


If x = 8 then y = (3 ×8)-1 = 23



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