Question

If y varies directly with x, if y=8 when x=3 how do you find the direct variation equation?

Answer 1

`y = 8/3 x`

Explanation:

It is told that y varies x, means `y prop x`
`rArr y = k x`
`rArr 8 = k. 3`
`rArr k = 8/3`
Hence `y = 8/3.x`