Find the sum using the number line.

Here is your

Using the number line you will have to start at -12Then drawing a line 15 spaces to the right of -12Which equals positive 3

You can also find the answer this way:

But they want you to use the number line so the first way is the one you need to take a look at:

Therefore your answer is "3" or the fourth option.

Hope this helps!

Did you put in a negative answer? no matter if you + - ÷ or ×, it will be negative example: -21 ÷ 3 = -7