## ineedyouubiebs 2 years ago Help Me!!

1. ineedyouubiebs

Find the point that is one-fourth of the way from (1,7) to (18,22)

2. ineedyouubiebs

@jim_thompson5910

3. jim_thompson5910

find the midpoint from (1,7) to (18,22) call this midpoint M

4. ineedyouubiebs

sorry for bothering you again you really help

5. jim_thompson5910

once you have M, use this to find the midpoint from (1,7) to M

6. jim_thompson5910

this works because the quarter point is exactly half way between the starting point and the midpoint

7. ineedyouubiebs

and what about the "one-fourth" in the sentence, what do we do with that?

8. jim_thompson5910

look at my next post after that

9. ineedyouubiebs

@jim_thompson5910 okay, i got (9.5,14.5)

10. jim_thompson5910

11. ineedyouubiebs

yup

12. jim_thompson5910

now you must find the midpoint from the starting point (1,7) to M(9.5, 14.5)

13. ineedyouubiebs

im lost, how would I do that?

14. jim_thompson5910

the same way you found the midpoint between the two original points (ignore M)

15. ineedyouubiebs

Would it be

16. ineedyouubiebs

i think i have an idea

17. ineedyouubiebs

i cant write it in the equation button, but would it be 1+x^2

18. ineedyouubiebs

ughh

19. jim_thompson5910

not sure how you're getting that

20. jim_thompson5910

just find the midpoint between (1,7) and (9.5, 14.5)

21. jim_thompson5910

so add up the coordinates, divide by 2

22. ineedyouubiebs

i mean would one point be 19?

23. jim_thompson5910

how are you getting 19?

24. jim_thompson5910

find the midpoint between (1,7) and (9.5, 14.5)

25. ineedyouubiebs

|dw:1379389868710:dw|

26. ineedyouubiebs

its a mess but i tried

27. jim_thompson5910

(1+9.5)/2 = ???

28. ineedyouubiebs

can you please set it up into the formula. this is new stuff for me and tommorow i have a test based on this

29. jim_thompson5910

what does (1+9.5)/2 evaluate to

30. ineedyouubiebs

5.25

31. jim_thompson5910

so that's the x coordinate of the midpoint between (1,7) and (9.5, 14.5) ie...it's the x coordinate of the quarter point

32. jim_thompson5910

do the same for the y coordinates

33. ineedyouubiebs

so for the y coordinates i would add 7+14.5 which will give me 21.5 and then divide it by 2 which will give me 21.5

34. jim_thompson5910

21.5/2 = ??

35. jim_thompson5910

you typed 21.5 twice

36. ineedyouubiebs

37. jim_thompson5910

yep, so the quarter point is (5.25, 10.75)

38. ineedyouubiebs

okay so will i always divide by 2? how do i know what do divide to? and would i always be adding as well?

39. jim_thompson5910

we're just finding midpoints

40. jim_thompson5910

a quarter point is a midpoint between the start and the original midpoint

41. jim_thompson5910

|dw:1379390420596:dw|

42. ineedyouubiebs

and what would we do if it was asking for the 1/2 of the way?

43. jim_thompson5910

44. jim_thompson5910

now add in the point which is 1/4 way from P to Q, call this point N point N is the midpoint between P and M |dw:1379390509988:dw|

45. ineedyouubiebs

so would the final answer be 5.25 or 10.75

46. jim_thompson5910

in retrospect, i should have named the quarter point Q, oh well

47. jim_thompson5910

they are used together to report the answer

48. jim_thompson5910

since all points are of the form (x,y)

49. ineedyouubiebs

so the final answer would be (5.25,10.75)

50. jim_thompson5910

yes

51. ineedyouubiebs

even though its just asking for 1 point? how do i know which point is it x or y?

52. jim_thompson5910

each and every point on a 2D coordinate grid is always of the form (x,y)

53. jim_thompson5910

so you need both x and y to figure out where you are on this grid

54. ineedyouubiebs

thanks so much!

55. jim_thompson5910

yw