Answer: -3 and 12
Step-by-step explanation:
First: your +12 is where you start
Your coordinates for that is (0,12) so, put one point on (0,12)
Second: your slope is -3. So at (0,12) you go down -3 and go to the right 1.
Connect the dots to make your line and you are finished!!
Hope this helps!! :)