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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
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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ineedyouubiebsBest ResponseYou've already chosen the best response.0
In my HW it says to find the slope it's (change in mass)/(change in volume)
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
@Luigi0210 help please?
 7 months ago

Luigi0210Best ResponseYou've already chosen the best response.0
Do you know the changes?
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
What do you mean by that?
 7 months ago

Luigi0210Best ResponseYou've already chosen the best response.0
Do you only have one set of values?
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
Oh no there's more. Want me to put them up?
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
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

ineedyouubiebsBest ResponseYou've already chosen the best response.0
Sorry I couldn't lined them up well I'm on my iPad right now
 7 months ago

Luigi0210Best ResponseYou've already chosen the best response.0
I got nothing, sorry
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
what happens if you treat the mass as the x coordinate and the volume as the y coordinate?
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
But that'll mean graphing all 10 of them
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
@dumbcow @dan815 got any ideas how to do this?
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
@Luigi0210 don't worry(:
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
tryin to find a website the will plot all the points
 7 months ago

zepdrixBest ResponseYou've already chosen the best response.0
kant, use this site, it's quite good :) https://www.desmos.com/calculator
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
looks like the slopes are about the same for a series of points...not sure what the question is looking for
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
thanks zepdrix i'll check that site too...the one i found called http://openstudy.com/study#
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
I'm missing clone wars for this!
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
@kantalope lol my bad and how does this help me find what I'm looking for?
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
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

ⒶArchie☁✪Best ResponseYou've already chosen the best response.4
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

kantalopeBest ResponseYou've already chosen the best response.1
if the data has a function we can find the variable slope based on the derivative of the function
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
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

kantalopeBest ResponseYou've already chosen the best response.1
I'm rearranging the data on the graph...
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
http://mcpchemistry1.wikispaces.com/file/view/HW4%20%20Density%20Graph%20Practice%20201314.doc/447730728/HW4%20%20Density%20Graph%20Practice%20201314.doc here is my HW, the question is on the last page
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
The points are all squirrely so a serious person would do some stat regression to find the mean
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
Ah ha...which is exactly what the graph was finding
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
I think your looking at the wrong page, it's the very last one
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
right so my pictures were plots of the data that we were given...it is all wonky
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
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

ineedyouubiebsBest ResponseYou've already chosen the best response.0
Yeah it is all "wonky" ughhh this is irritating
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
that's ok that is how real data works
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
Yeah, I know what your saying
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
You sure I'm not just suppose to divide or subtract?
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
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

kantalopeBest ResponseYou've already chosen the best response.1
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

kantalopeBest ResponseYou've already chosen the best response.1
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

ineedyouubiebsBest ResponseYou've already chosen the best response.0
Becauseatfirst I taught I was only suppose to divide and ill get the answer, but apparerently not
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
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

kantalopeBest ResponseYou've already chosen the best response.1
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

kantalopeBest ResponseYou've already chosen the best response.1
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

mary.rojasBest ResponseYou've already chosen the best response.2
Can you explain in a different way, she cant understand
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
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

ineedyouubiebsBest ResponseYou've already chosen the best response.0
Yes, I do understand that thAt was one of the questions lol
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
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

ineedyouubiebsBest ResponseYou've already chosen the best response.0
Somehow I think I'm just suppose to divide, and I'm just complicating myself!
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
well number 2 on the second to last page says graph it....so there is that
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
Yeah and I already graphed it
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
and the graph show some dots that make a line and some other dots that make a different line?
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
so the last question says to calculate the slope of each of those lines m= (y1y0) / (x1x0) if you pick any two points on the two lines you can get the slope
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
Can you do the first one as an example? Please
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
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

kantalopeBest ResponseYou've already chosen the best response.1
y1= 12.9 y0 = 6.2 x1= 1.45 x0 = .69 6.7/.76 = 8.82
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
No it's suppose to be 1.16 and 8.5
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
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

kantalopeBest ResponseYou've already chosen the best response.1
I started with the top line....that point is on the lower line...you can go with whatever one first
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
So I'll divide it like 1.16/8.5 correct?
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
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

kantalopeBest ResponseYou've already chosen the best response.1
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 y1y0 thing
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
I hope that means you are going ...ah, I get it rather than ah @$%$ it =)
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
Ahhhh crap? Lol I think I'm complicating it more that I should that's why , but that's all
 7 months ago

kantalopeBest ResponseYou've already chosen the best response.1
k gl im out its really late here
 7 months ago

ineedyouubiebsBest ResponseYou've already chosen the best response.0
Yeah get some sleep goodnight
 7 months ago
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