Let me show you an example once you plug in the numbers correctly.
I created a table which was x- 0, 1, 2, 3 and y- 0, -4, -8, -12. As you can notice x has been multiplied by -4 to create the product y. So the equation above represents the relationship.
In my opinion there are an infinite amount of answers though what i got when i solver wasn’t right i would think you just have to try and solve on your own.