Question

If y varies directly as x, and y = 10 when x = 9, find y when x = 1/9

Answer 1

10/81

Explanation:

let,

y=kx

y=10 when x=9

so,

10=k×9

or, k=10/9

when x=1/9

y=kx

or, y=(10/9)×(1/9)

or, y=10/81