If x and y vary inversely as each other and
(i) x = 3 when y = 8, find y when x = 4
(ii) x = 5, when y = 15, find x when y = 12
(iii) x = 30, find y when constant of variation = 900
(iv) y = 35, find x when constant of variation = 7
(i) Let 
| 3 | 4 |
| 8 |
|
Therefore y is 6
(ii) Let 
| 5 |
|
| 15 | 12 |
Therefore x is 
(iii) Let y is p
Constant of variation is 900
Therefore p is 30
(iv) Let x is p
Constant of variation is 7
Therefore x is 
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