Question

Is `2y-5x=0` a direct variation equation and if so what is the constant?

Answer 1

Yes. `k = 5/2`

Explanation:

When we say that a variable `y` directly varies with `x`, we express it in the form

`y = kx`

Given `2y - 5x = 0`, we have

`=> 2y = 5x`

`=> y = 5/2x`

We were able to able express `y` in terms of `x` and we have `k = 5/2`