Question

Does the equation `y=8` represent a direct variation and if so, identify the constant of variation?

Answer 1

`y=8` is not a direct variation.

Explanation:

For an equation to be a direct variation doubling the value of the independent variable (`x`) must double the value of the dependent variable (`y`).

Given `y=8`

If `x=1` then `y=8`
If `x=2` then `y=8`

Obviously the value of `y` has not doubled although the value of `x` was doubled; therefore this is not a direct variation.