## EmmaH 3 years ago Could spomeone please take the time to help me understand this?? Write the point-slope form of the equation passing through (5, -1) with a slope of 6.

1. EmmaH

these are the answers : y-1=6(x+5) y+5=6(x-1) y+1=6(x-5) y-5=6(x+1)

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point slope form y-y1=m(x-x1) m=slope

3. 03225186213

y-(-1)=6(x-5) y+1=6(x-5)

4. EmmaH

there is only one set of numbers how can i find m?

5. 03225186213

slope is given in question see it

6. EmmaH

oh so m=6

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8. kymber

|dw:1352221469604:dw|

9. EmmaH

am i using y=mx+b?

10. 03225186213

you cant use this because you didnt know what is b (y-intercept)

11. EmmaH

ok then what? k=mx?

12. kymber

y=mx+b is slope-intercept form. This is point-slope form. You use point-slope form. All you do is plug in the numbers. That's all you do. Look at what I drew it explains it all. M is the slope and (x, y) is the point given.

13. EmmaH

y-y1=m(x-x1)??

14. EmmaH

oh and if i suddenly go off line itsbecause we dont have elctricity and my battery is dying

15. kymber

|dw:1352222119451:dw|

16. EmmaH

6(-5-5(1)?

17. brinethery

First, we find the y-intercept. -1 = 6(5) + b

18. EmmaH

1-1(1)=6 5-51)

19. EmmaH

those two are appart of the sam equation..

20. brinethery

Once you solve for b, you have your slope (m=6) and y-intercept. I calculated it and found b= -1-30 = -31 y = 6x + (-31) therefore, y = 6x -31

21. EmmaH

so we are using y=mx+b?

22. kymber

|dw:1352222244438:dw|

23. EmmaH

um how did you find b?

24. brinethery

Do what Kymber did. That's another way to write the equation of a line. You end up with the same result.

25. kymber

It says "point-slope form", that is not y=mx+b. The answer choices you gave are in point-slope form. I don't know why Brinethery is talking about slope-intercept form.

26. brinethery

This is point slope form: http://www.freemathhelp.com/point-slope.html Exactly what Kymber did.

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