anonymous
  • anonymous
Help, please?
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
The table below shows the distance y, in miles, traveled by a toy car in x minutes: Time (x) (minutes) 20 30 40 50 Distance (y) (miles) 5 10 15 20 Part A: What is the most likely value of the correlation coefficient of the data in the table? Based on the correlation coefficient, describe the relationship between time and distance traveled by the toy car. (4 points) [Choose the value of correlation coefficient from 1, 0.8, 0.5, 0.02] Part B: What is the value of the slope of the graph of distance versus time, and what does the slope represent? (3 points) Part C: Does the data in the table represent correlation or causation? Explain your answer. (3 points)
anonymous
  • anonymous
anonymous
  • anonymous

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anonymous
  • anonymous
I really need help with this, please?
dan815
  • dan815
can you tell me how many miles you go up every 10 mins
anonymous
  • anonymous
It goes up 5 miles every 10 minutes.
dan815
  • dan815
okay slope is given by change in y/change in x so slope=5/10=1/2=0.5
anonymous
  • anonymous
Okay, so was that a different way of asking for slope?
dan815
  • dan815
this is part B part A u have to use correlation coefficeint formula
anonymous
  • anonymous
Oh! Okay, now I'm catching up. That confused me for a moment there.
dan815
  • dan815
depending on how high the correlation coefficent is it tells you how dependant the the values of y are on x, or vice vera
anonymous
  • anonymous
Okay, I think that makes sense. What's next?
dan815
  • dan815
do it
dan815
  • dan815
http://prntscr.com/87gi5m
dan815
  • dan815
http://prntscr.com/87gija this one is actually best
anonymous
  • anonymous
Holy cow that looks terrifying-
dan815
  • dan815
lol
dan815
  • dan815
dont be scared
dan815
  • dan815
find each one what is Sum(x) Sum(y) Sum(xy) sum(x^2) sum(y^2)
dan815
  • dan815
and plug it into the fromula
dan815
  • dan815
n is the number of points so its4 in your case
dan815
  • dan815
|dw:1440207859976:dw|
dan815
  • dan815
fill out those values and plug into formula, i can tell you right now, that the correlation is most likely +1 as it can be modeled perfectly as a slope intercept formula
anonymous
  • anonymous
I'm trying to figure it out but I'm still really confused
anonymous
  • anonymous
It just doesn't make any sense to me, do you think you could walk me through it?

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