## Jordans_openstudy one year ago Find the distance between (-2,8) and (11,2). round to the nearest hundredth

1. Jordans_openstudy

@abswag13

2. Black_ninja123

Do you know the distance formula?

3. anonymous

yep

4. anonymous

|dw:1433268589918:dw|

5. anonymous

just plug in and solve

6. anonymous

7. anonymous

8. anonymous

x2=11

9. anonymous

x1= -2

10. anonymous

just plug in and solve and you get the answer

11. Black_ninja123

$\sqrt{11-(-2)^{2}+2-8^{2}}$

12. Black_ninja123

$\sqrt{169+36}$

13. anonymous

the slope is -6/13

14. Black_ninja123

$\sqrt{205}=14.31$

15. anonymous

16. Jordans_openstudy

ohhh okay i think i am getting it now !

17. anonymous

jords openstudy r u looking for slope?

18. anonymous

or something else?

19. Jordans_openstudy

It says find the distance between and round to the nearest hundredth

20. anonymous

21. Black_ninja123

He is not looking for the slope he is looking for the distance between the 2 points

22. Jordans_openstudy

Would that be the same thing or ? i am so bad at math lmao

23. Black_ninja123

Finding the slope is different

24. Jordans_openstudy

ninja would that be 14.31 as you gave me above?

25. Black_ninja123

yes but what is 14.31 nearest hundredth

26. Jordans_openstudy

14.30?

27. anonymous

|dw:1433269011563:dw|

28. Black_ninja123

Yes

29. anonymous

that is the distance formula

30. Jordans_openstudy

Okay cool thanks !

31. geerky42

|dw:1433269114813:dw|

32. anonymous

thx @geerky42

33. anonymous

i forgot the ^2

34. geerky42

Distance formula is in form of Pythagorean Theorem.

35. geerky42

No problem

36. Jordans_openstudy

Could you guys help me with this one ? http://i61.tinypic.com/ofdgg3.jpg

37. Jordans_openstudy

@abswag13 @geerky42

38. geerky42

Do you know what this line is?

39. geerky42

at x=1, y=1 at x=2, y=2 at x=3, y=3 and so on...

40. Jordans_openstudy

wait I'm confused

41. Jordans_openstudy

what do you mean on the second comment?

42. geerky42

Never mind Any lines can be expressed as $$y = mx+b$$, where $$m$$ is slope and $$b$$ is y-intercept. what is y-intercept here? Do you know?

43. Jordans_openstudy

Im really not so sure

44. geerky42

y-intercept is where line intersect y-axis

45. geerky42

where is this line intersect y-axis?

46. geerky42

|dw:1433270175000:dw|

47. Jordans_openstudy

0

48. geerky42

yeah, so b is 0. $$y = mx+0$$ which is same as $$y = mx$$ Now for m (slope), you know how to find slope?

49. geerky42

$$\text{Slope} = \dfrac{\text{rise}}{\text{run}}$$

50. Jordans_openstudy

I forgot how to find the slope

51. geerky42

For each "run", how much does it rise?

52. geerky42

|dw:1433270481630:dw|

53. geerky42

Arrows are so small, sorry lol

54. Jordans_openstudy

no worries haha

55. Jordans_openstudy

is rise a ? or 2 ? hard to tell