Question

In which ofthe following tables, x and y vary directly:

(i) 

x	3	5	8	11
y	4.5	7.5	12	16.5

(ii) 

x	16	30	40	56
y	32	60	80	84

(iii) 

x	27	45	54	75
y	81	180	216	225

Answer 1

x and y are not in direct variation.