Question

How do you tell wether the equation `y = 8x` represents direct variation and if so, how do you identify the constant of variation?

Answer 1

`y=8x` represents direct variation

The constant `k=8`

Explanation:

Direct variation is when a variable is a constant multiple of the other.

`y` is directly proportional to `x` by a multiple constant `k`

`rArry=kx`

So for `y=8x`, `y` is a multiple constant (`k=8`) of `x` `8` times. Hence it is a direct variation.