Question

Which is an equation of a direct proportion?

Answer 1

If
`y` varies directly with
`x`, then their ratio is constant:

`(y)/(x)=k`

So, we can write

`y=kx`

Answer 2

It can be y=ox which means y varies directly as x or y is directly proportional as x where I is constant in the equation

Example: y is directly proportional to x when x= 15 y=30