Having trouble.. help?

(A)

Step-by-step explanation:

Using the values of (-6, -3), (3,6), and (5,8) we can substitute the values into each equation and see if the equation meets the requirements for all 3.

Let's test A first.

Correct, let's try the second pair.

Correct, let's try the third pair.

So yes, this equation works.

For fun, let's try the other equations.

Let's test B.

This is not true as -6 -3 = -9. So this equation is immediately ruled out.

Let's test C.

Again this doesn't work, as -6 times 2 is -12. So this equation is also ruled out.

Let's try D.

This works, as half of -6 is -3 - however the equation will only work if all 3 pairs work for it.

Let's try the second pair.

This doesn't work, as half of 3 is 1.5. This equation is also ruled out.

Therefore, A is the only equation that works with these pairs.

Hope this helped!