I really need help and I don’t understand this question at all

I think that if they are asking for -k, they are asking for the opposite of what the numbers there are. this means the correct answer is probably the one you have selected. For example if k=2, -k would equal -2. Think about it like this:

Any variable has a 1 next to it. If you have the variable x, it is actually 1x, y, 1y. Now if you make it negative, this variable turns into -1x. You don't want your variable to have a negative, so you divide by negative one, making the number on the other side turn into it's opposite.

Ex;

-1x=2

(Divide by -1)

x= -2

triangle and cube

step-by-step explanation: