anonymous
  • anonymous
hello
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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bahrom7893
  • bahrom7893
hiya!
anonymous
  • anonymous
hi
bahrom7893
  • bahrom7893
u have a question?

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anonymous
  • anonymous
can you help me? Im stuck on a math problem for school...
bahrom7893
  • bahrom7893
post the question here, and i hope its not due tmorrow plz, i gotta go to bed too lol
anonymous
  • anonymous
Manufactures are installing fewer smaller rims in favor of larger rims. One advantage of bigger rims is that they are better for braking. The following table lists the increase in 16 inch rim sales as a percentage of new vehicle sales for selected years from 1996 to 2002. Sales of 16 inch rims Year 1996, 1998, 2000, 2002 Percentage 28, 36, 43, 51 1)Plot the data in a scatter plot 2)Calculate the slope between consecutive points in the table. Intercept each slope. 3) Find the equation of a line that models the data. (Hint: you may want to use the point- slope form, y-y1=m(x-x1)) 4)Does your line model the data exactly? Could a line model these data exactly? explain 5)Use your equation to write a function P that models these data. 6) Evaluate P (1999) and intercept your results.
anonymous
  • anonymous
I dont need the whole problem. I only need # 5. I cant figure out what function P means...
bahrom7893
  • bahrom7893
u know how ur line is y-y1=m(x-x1), just solve it for y and that will be ur function P
bahrom7893
  • bahrom7893
That's it
anonymous
  • anonymous
Thats what Im stuck on
bahrom7893
  • bahrom7893
post the equation that u got
anonymous
  • anonymous
how do I know what to put in for y and y1 and stuff?
bahrom7893
  • bahrom7893
run the linear regression
anonymous
  • anonymous
Well, Im not really sure what I got. I plotted the info on a graph. Then I determined the intercepts somehow, but I dont know if they are right. Im sorry, Im so stupid with this stuff.
bahrom7893
  • bahrom7893
can i just post the answers?
anonymous
  • anonymous
between 28-36 i got 2/4 or 1/2
anonymous
  • anonymous
Thts fine. Its a team assignment, so I only need number 5. I just cant figure out how to get there.
anonymous
  • anonymous
i have been working on this one problem for 4 hours now...
anonymous
  • anonymous
hello? Are you still here? Anyone? Please..
bahrom7893
  • bahrom7893
i am
bahrom7893
  • bahrom7893
workin on it
anonymous
  • anonymous
oh, Im sorry. Thank you so much for your help. I am so frustrated and tired.
bahrom7893
  • bahrom7893
so am i, okay ill just use: x = 1996 x1 = 2000 y = 28 y1 = 43
anonymous
  • anonymous
okay...
bahrom7893
  • bahrom7893
M = (28-43)/(1996-2000)
bahrom7893
  • bahrom7893
M = -15/-4 = 15/4
bahrom7893
  • bahrom7893
y - 43 = (15/4)*(x - 2000)
bahrom7893
  • bahrom7893
y = 15x/4 - 7500+43
bahrom7893
  • bahrom7893
y = 15x/4 - 7457
bahrom7893
  • bahrom7893
P(x) = 15x/4 - 7457 P(1999) = 39.25 (plug in 1999 instead of x)
bahrom7893
  • bahrom7893
Please click on become a fan if I helped, thanks!
anonymous
  • anonymous
Thank you so very much!! Im still not too sure how I explain it, but it has helped me somewhat understand it!
bahrom7893
  • bahrom7893
ur welcome!
anonymous
  • anonymous
are you on this a lot? I may have more question next week?
anonymous
  • anonymous
what was ur answer on question 3 of this problem
anonymous
  • anonymous
cos i have the same problem to tackle

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