Q77 of 106 Page 310

From the following table, determine if x and y are in direct proportion or not.

(i)


(ii)


(iii)

In direct proportion, = k(constant)


For table (a),



⇒


i.e.


So, (a) is not in direct proportion.


For table b,



⇒


i.e.


So, (b) is in direct proportion.


For table (c)



⇒


i.e.


so, (c) is in direct proportion.


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