which equivalent ratio proportional relationship with the constant proportionality equals -2 select all that apply

The expression that represent proportional relationship has the form:
[tex]y=kx[/tex]where k is the constant of proportionality.
In this case we are looking for a relationship of the form:
[tex]y=-2x[/tex]or something equivalent. If we multiply both sides by two we get:
[tex]2y=-4x[/tex]Those two are the relations that fulfill the conditions given.