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ineedyouubiebs

I know this is not math but whatever. If the mass is 1.16 and the volume is 8.5 what is the slope?

  • 7 months ago
  • 7 months ago

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  1. ineedyouubiebs
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    In my HW it says to find the slope it's (change in mass)/(change in volume)

    • 7 months ago
  2. ineedyouubiebs
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    @Luigi0210 help please?

    • 7 months ago
  3. Luigi0210
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    Do you know the changes?

    • 7 months ago
  4. ineedyouubiebs
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    What do you mean by that?

    • 7 months ago
  5. Luigi0210
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    Do you only have one set of values?

    • 7 months ago
  6. ineedyouubiebs
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    Oh no there's more. Want me to put them up?

    • 7 months ago
  7. ineedyouubiebs
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    Label 1) mass: 1.16 g volume:8.5 . Label 2) mass:0.98 volume: 7.2. Label 3) mass: 1.13 volume:10.0 . Label 4) mass: 0.69 volume: 6.2. Label 5) mass: 0.83 volume:6.0. Label 6) mass:1.45 volume: 12.9. Label 7) mass: 0.88 volume: 7.9. Label 8) mass: 1.03 volume: 7.5. Label 9) mass: 0.74 volume: 5.4. Label 10) mass: 1.02 volume: 7.5

    • 7 months ago
  8. ineedyouubiebs
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    Sorry I couldn't lined them up well I'm on my iPad right now

    • 7 months ago
  9. Luigi0210
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    Uhm

    • 7 months ago
  10. ineedyouubiebs
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    Yeah?

    • 7 months ago
  11. Luigi0210
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    I got nothing, sorry

    • 7 months ago
  12. kantalope
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    what happens if you treat the mass as the x coordinate and the volume as the y coordinate?

    • 7 months ago
  13. ineedyouubiebs
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    But that'll mean graphing all 10 of them

    • 7 months ago
  14. kantalope
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    ya working on ti

    • 7 months ago
  15. ineedyouubiebs
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    @dumbcow @dan815 got any ideas how to do this?

    • 7 months ago
  16. ineedyouubiebs
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    @Luigi0210 don't worry(:

    • 7 months ago
  17. ineedyouubiebs
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    @zepdrix ?

    • 7 months ago
  18. kantalope
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    tryin to find a website the will plot all the points

    • 7 months ago
  19. ineedyouubiebs
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    Okay thanks

    • 7 months ago
  20. zepdrix
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    kant, use this site, it's quite good :) https://www.desmos.com/calculator

    • 7 months ago
  21. kantalope
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    looks like the slopes are about the same for a series of points...not sure what the question is looking for

    • 7 months ago
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  22. kantalope
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    thanks zepdrix i'll check that site too...the one i found called http://openstudy.com/study#

    • 7 months ago
  23. kantalope
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    I'm missing clone wars for this!

    • 7 months ago
  24. ineedyouubiebs
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    @kantalope lol my bad and how does this help me find what I'm looking for?

    • 7 months ago
  25. kantalope
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    typically when you are looking for slope you are looking for the change in whatever based on the change in the other thing.....these changes aren't a straight line. what else does the question have?

    • 7 months ago
  26. ⒶArchie☁✪
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    it is a bit confusing that a slope can be asked when mass and volume are given. However, if the slope is meant to mean density, then I will say the slope= mass/volume.

    • 7 months ago
  27. kantalope
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    if the data has a function we can find the variable slope based on the derivative of the function

    • 7 months ago
  28. kantalope
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    heh - I'll bet I'm supposed to be able to figure out this kind of problem at the end of the semester not the beginning...and the martini I just finished in not helping...

    • 7 months ago
  29. kantalope
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    I'm rearranging the data on the graph...

    • 7 months ago
  30. ineedyouubiebs
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    http://mcpchemistry1.wikispaces.com/file/view/HW4%20-%20Density%20Graph%20Practice%202013-14.doc/447730728/HW4%20-%20Density%20Graph%20Practice%202013-14.doc here is my HW, the question is on the last page

    • 7 months ago
  31. kantalope
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    The points are all squirrely so a serious person would do some stat regression to find the mean

    • 7 months ago
  32. kantalope
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    Ah ha...which is exactly what the graph was finding

    • 7 months ago
  33. ineedyouubiebs
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    I think your looking at the wrong page, it's the very last one

    • 7 months ago
  34. kantalope
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    right so my pictures were plots of the data that we were given...it is all wonky

    • 7 months ago
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  35. kantalope
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    If we were measuring stuff that had a consistent mass to volume ratio the line would be nice and straight....the more stuff we had the more it would weigh yea?

    • 7 months ago
  36. ineedyouubiebs
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    Yeah it is all "wonky" ughhh this is irritating

    • 7 months ago
  37. kantalope
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    that's ok that is how real data works

    • 7 months ago
  38. ineedyouubiebs
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    Yeah, I know what your saying

    • 7 months ago
  39. ineedyouubiebs
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    You sure I'm not just suppose to divide or subtract?

    • 7 months ago
  40. kantalope
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    so our data is sloppy could mean a couple of things like the hint suggests - maybe some of the chunks we are looking at are real rocks and some are plastic fake rocks

    • 7 months ago
  41. ineedyouubiebs
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    Their metals

    • 7 months ago
  42. kantalope
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    nah if you were serious about this data you would plot it out like we did and look if it was in straight lines...if it was not you would do a process called regression to find the average slope between the plot points

    • 7 months ago
  43. kantalope
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    right so some of metal is real and some of it isn't or some of the metal is a different kind or you could just be kinda sloppy in measuring the volume or the mass...rounding up sometimes and rounding down others or if you have different people doing the measuring the data will get screwy

    • 7 months ago
  44. ineedyouubiebs
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    Becauseatfirst I taught I was only suppose to divide and ill get the answer, but apparerently not

    • 7 months ago
  45. kantalope
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    So for the last page you can paste in the plots in the pictures and a hypothesis is that the measurements are not consistent and that there seems to be two different trend lines in the data so there are probably two different kinds of metal in the sample with two densities regression wiki: http://en.wikipedia.org/wiki/Least_squares

    • 7 months ago
  46. kantalope
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    If you did just divide each set of points to get a series of numbers....I'll bet you get two sets of answers...lemme check that

    • 7 months ago
  47. ineedyouubiebs
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    Okay(:

    • 7 months ago
  48. kantalope
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    actually turns out that there are more like 3 sets of ratios - .14 is the answer to 3 samples .111 to three and .138 to three more <-- this also points to something funny with the data if the ration of volume to mass was the same all the samples would have basically the same well ratio ya ----so just dividing would show something but the graph makes it easier to see

    • 7 months ago
  49. mary.rojas
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    Can you explain in a different way, she cant understand

    • 7 months ago
  50. kantalope
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    If the samples were consistent - all made of the same stuff - if you had more stuff it would weigh more....a big gold coin has more mass (weighs more) than a small gold coin...and that change in size and mass would be consistent. A coin that is twice as big would weigh twice as much....does that make sense?

    • 7 months ago
  51. ineedyouubiebs
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    Yes, I do understand that thAt was one of the questions lol

    • 7 months ago
  52. kantalope
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    so if i started handing you coins that were twice as big but didn't weigh twice as much ...you would say "dood, you are rippin me off, these are not gold coins" that is what the first graph is showing ....there are four coins in the top line with a certain volume to weight ratio (slope) and then 6 coins in another line with a different volume to weight ratio(slope)

    • 7 months ago
  53. ineedyouubiebs
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    Somehow I think I'm just suppose to divide, and I'm just complicating myself!

    • 7 months ago
  54. kantalope
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    well number 2 on the second to last page says graph it....so there is that

    • 7 months ago
  55. ineedyouubiebs
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    Yeah and I already graphed it

    • 7 months ago
  56. kantalope
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    and the graph show some dots that make a line and some other dots that make a different line?

    • 7 months ago
  57. ineedyouubiebs
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    Yeah they do

    • 7 months ago
  58. kantalope
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    so the last question says to calculate the slope of each of those lines m= (y1-y0) / (x1-x0) if you pick any two points on the two lines you can get the slope

    • 7 months ago
  59. ineedyouubiebs
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    Can you do the first one as an example? Please

    • 7 months ago
  60. kantalope
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    ok top line the first point is (.69, 6.2) and another point on that line looks like (1.45, 12.9) would you agree?

    • 7 months ago
  61. kantalope
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    y1= 12.9 y0 = 6.2 x1= 1.45 x0 = .69 6.7/.76 = 8.82

    • 7 months ago
  62. ineedyouubiebs
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    No it's suppose to be 1.16 and 8.5

    • 7 months ago
  63. kantalope
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    the points on the other line are (0.74,5.4), ( 0.83,6.0), ( 0.98, 7.2), ( 1.02 ,7.5), ( 1.03, 7.5), (1.16,8.5) you can use any of those points to calculate the slope of the second line

    • 7 months ago
  64. kantalope
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    I started with the top line....that point is on the lower line...you can go with whatever one first

    • 7 months ago
  65. ineedyouubiebs
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    So I'll divide it like 1.16/8.5 correct?

    • 7 months ago
  66. kantalope
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    not if you want to calculate the slope like the last question asks...dividing will just get you the ratio not the slope...

    • 7 months ago
  67. kantalope
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    I made the graph bigger so it is easier to see the two different lines....we are looking for the slope of those two lines I think that the instructions are confusing as they ask for the change in mass over the change in volume....simply dividing is not the change....it is just the mass over the volume...in order to get the change part you have to do the y1-y0 thing

    • 7 months ago
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  68. kantalope
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    I hope that means you are going ...ah, I get it rather than ah @$%$ it =)

    • 7 months ago
  69. ineedyouubiebs
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    Ahhhh crap? Lol I think I'm complicating it more that I should that's why , but that's all

    • 7 months ago
  70. kantalope
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    k gl im out its really late here

    • 7 months ago
  71. ineedyouubiebs
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    Yeah get some sleep goodnight

    • 7 months ago
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