Question

If y=10 when x=4, how do you find x when y=2 given that y varies inversely as x?

Answer 1

`x=20`

Explanation:

`y prop 1/x or y = k* 1/x or y * x = k` [k is constant]

`y=10 ; x= 4 :. k= 10*4 =40 :. y*x=40`

The inverse variation equation is `y*x=40 ; y=2 , :. x= 40/2 =20`

`x=20` [Ans]