Question

The variables x and y vary inversely. Use x = 4 and y = 8 to write an equation relating x and y. Then find y when x

= 2.

Answer 1

1. y=
2. 
   `(32)/(x)`
3. 16

Explanation:

y=

`(k)/(x)`

when x=4 and y = 8

k =xy

k=4×8=32

:- y=

`(32)/(x)`

when x = 2

y=

`(32)/(2)`

:- y = 16