In order to figure out this question, we will be looking at what we have to multiply the values in the x column by in order to get the corresponding F(x) value. So, let's begin:

So what times zero equals zero?

Well, everything, so that doesn't really help us

Now, let's look at x=2. So we need to find some number, let's call it k, that when we multiply it by 2 we get -1.

We set up this equation: 2k=-1

We solve for k by "undo-ing" the multiplication of 2 and k.

2k=-1

2k/2=-1/2

k=-1/2= -.5

So k= -0.5

We can repeat that process for the other x values too. (or just check it since we have a direct variation)