Question

Does the equation `2y = - 8x` represent a direct variation and if so, identify the constant of variation?

Answer 1

`k =-4`

Explanation:

A direct variation can be written in the form `k = x/y (or y/x)`

Simplify `2y =-8x` to get `y = -4x`

`y=-4x`

`rArr y/x =-4`

Therefore this does represent a direct variation with `k = -4`