## NY,NY 3 years ago M= Rise/ Run so if the slope is -2, the rise will be -2 and the run will be 1. Is the run positive or negative? I'm going to use this slope of an equation to graph and i want to know which direction the line will go.

1. theEric

Well, just algebraically you can see$-2=-\frac{2}{1}=\frac{-2}{1}=\frac{2}{-1}$

2. theEric

So if you have a negative rise (look at the third expression for an example) $(\frac{-2}{1})$ then you have a positive 1 as your run.

3. NY,NY

oh, so if the rise is a whole number and it is negative, the run will be positive

4. theEric

As long as you let your rise be negative! :) You can actually work it out both ways, as long as just one of rise or run is negative. Look at -2/1. Then you go down 2, and right 1. Look at 2/-1. Then you go up 2, and left 1. It's just because they're opposite! -2 from 2, and 1 from -1, I mean.

5. NY,NY

yeah I get it :)

6. NY,NY

oh wait, say the slope is -2/3 then is the rise is negative and the run positive?

7. theEric

|dw:1349127841419:dw|

8. NY,NY

yeah, that's how I graphed mine. Thanks for that :D

9. theEric

|dw:1349127864880:dw| I started drawing the picture, so I decided to finish. I'm glad you've got it! Thank you!

10. NY,NY

thank me? thank you! :D you're very helpful.

11. theEric

Haha, I'm glad I could be of service :) Take care! Good luck, too!

12. theEric

And thank you :)

13. NY,NY

sure :D