Fill in the blanks in each of the following so as to make the statement true: (i) Two quantities are said to vary ______ with each other if they increase (decrease) together in such a way that the ratio of the corresponding values remains same. (ii) `x\ a n d\ y` are said to vary directly with each other if for some positive number `k` , _____ =` k` (iii) If `u\ =3\ v ,` then u and `v` vary ______. with each other.

Explanation

(i)Two quantities are said to vary directly with each other if they increase (decrease) together in such a way that the ratio of the corresponding values remains the same.

(ii) `x` and `y` are said to vary directly with each other if for some positive number `k`, `x/y= k`

(iii) If ` u=3 v` ,then `u` and `v`will vary directly proportional with each other.