## spidergirl51 2 years ago (-3 and 4) and (3,-4) find the slope

1. zaynahf

Use slope formula: $m = \frac{ y _{2}- y _{1} }{ x _{2}-x _{1} }$ Using the points: (-3 and 4) and (3,-4) $y _{2}= -4, y _{1}= 4$$x _{2}= 3 , x _{1}= -3$

2. spidergirl51

i did

3. zaynahf

What did you get?

4. spidergirl51

i got -4/3

5. spidergirl51

|dw:1357701162432:dw|

6. zaynahf

7. spidergirl51

-8

8. ChmE

why is that not right. looks good to me

9. zaynahf

And the bottom?

10. spidergirl51

6

11. spidergirl51

then isimplifed

12. spidergirl51

i need the y intercept as well

13. zaynahf

Im sorry.. i forgot to reduce it.. you were right. It is -8/6, or -4/3

14. zaynahf

Then you need to use point slope form

15. spidergirl51

oh

16. spidergirl51

hmm

17. spidergirl51

idk

18. zaynahf

$y - y _{1}= m ( x - x _{1})$

19. spidergirl51

i know that

20. spidergirl51

i dont know how to solve it

21. zaynahf

Now plug in the points and the slope

22. spidergirl51

so

23. spidergirl51

y-4=-4/3(x-3)

24. spidergirl51

right

25. zaynahf

Which point did you use?

26. spidergirl51

-3 and 4

27. spidergirl51

(-3,4)

28. zaynahf

Ok for the last part, it would be x + 3 because of hte double negative

29. spidergirl51

oh okay then wat

30. zaynahf

Now distribute the right side, and isolate the y

31. spidergirl51

can u help me with it

32. zaynahf

Do you know how to distribute?

33. spidergirl51

yes i got -4/3x-4

34. spidergirl51

when i distrubute

35. zaynahf

Ok, now carry over the # on the left

36. spidergirl51

what u mean can ushow me

37. zaynahf

y - 4 = -4/3x - 4 +4 +4 ------------------ Solve that

38. spidergirl51

its o

39. zaynahf

Y-int, right?

40. spidergirl51

yeah

41. zaynahf

Then you're done

42. spidergirl51

thanks