## icedancerfigureskater 2 years ago HELP! 2 math questions that i've been stuck on for ages!! need answers quick!!

1. icedancerfigureskater

@jim_thompson5910 @satellite73 @henryarias5

2. icedancerfigureskater

@LilyKitty

3. icedancerfigureskater

@Directrix @cwrw238

4. Preetha

It is a little difficult to see the problem. I suggest you close this and just type it out.

5. icedancerfigureskater

You can click on it and zoom it in though.. @Preetha

6. Directrix

I see 3 problems. Which two of these do you want to work on? @icedancerfigureskater

7. icedancerfigureskater

The two with charts attached, so 4 and 5. @Directrix

8. pgpilot326

do you know the formula for r?

9. icedancerfigureskater

no @pgpilot326

10. pgpilot326

why not? seems you should know it or have access to it to do thses types of problems. i can write for you if you'd like but it might be better if you had it in a book

11. icedancerfigureskater

can you write it out? @pgpilot326

12. pgpilot326

$r=\frac{ \sum{ xy }-n\bar{x}\bar{y}}{(n-1)s _{x}s _{y}}$

13. icedancerfigureskater

wow okay so how can i use that to solve my first problem?

14. pgpilot326

do you know what r is?

15. pgpilot326

do you have a calculator... like a TI-83 or something similar?

16. pgpilot326

sorry... don't want to discurage you but there seems to be some people here who just want answers and aren't really interested in learning. it just seems to me if you're doing regression you should have an idea of what's what, like xbar and s_x etc.

17. pgpilot326

forgot an o.. sorry

18. pgpilot326

you still there?