Howard-Wolowitz
  • Howard-Wolowitz
If an object is dropped from a height, its downward speed theoretically increases linearly over time because the object is subject to the steady pull of gravity. Here are observational data on the speed of a ball dropped from a certain height at time x = 0: Time (seconds) X 0 0.2 0.4 0.6 0.8 Speed (m/sec) Y 0 1.92 3.58 6.01 7.88
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Howard-Wolowitz
  • Howard-Wolowitz
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xMissAlyCatx
  • xMissAlyCatx
Let me graph it real fast and see if I can determine a correlation.
Howard-Wolowitz
  • Howard-Wolowitz
Ok, thanks for helping me AlycaT

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xMissAlyCatx
  • xMissAlyCatx
K well here is the graph.
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xMissAlyCatx
  • xMissAlyCatx
I do believe for this we will have to do the standard deviation again like we did once before with the trillions of steps.
xMissAlyCatx
  • xMissAlyCatx
We can tell though that the correlation is positive.
Howard-Wolowitz
  • Howard-Wolowitz
ok awesome, are you cool with helping me with the billion steps again
xMissAlyCatx
  • xMissAlyCatx
Yes if you would like me to. :)
xMissAlyCatx
  • xMissAlyCatx
We can use this as a guide again.
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xMissAlyCatx
  • xMissAlyCatx
So first thing to do is get all of your x-values and find the average, then do the same with the y's.
xMissAlyCatx
  • xMissAlyCatx
The average of the x's is .4 The average of the y's is 3.882
xMissAlyCatx
  • xMissAlyCatx
Your next step is to subtract .4 from every x-value and to subtract 3.882 from every y-value..
Howard-Wolowitz
  • Howard-Wolowitz
ok give me one second plz
xMissAlyCatx
  • xMissAlyCatx
x-values 0 - .4 = -.4 .2 - .4 = -.2 .4 - .4 = 0 .6 - .4 = .2 .8 - .4 = .4 y-values 0 - 3.882 = -3.882 1.92 - 3.882 = -1.962 3.58 - 3.882 = -.302 6.01 - 3.882 = 2.128 7.88 - 3.882 = 3.998
Howard-Wolowitz
  • Howard-Wolowitz
i got all of those for z the same
Howard-Wolowitz
  • Howard-Wolowitz
*x I mean
xMissAlyCatx
  • xMissAlyCatx
Your next step is to multiply your x-values by your y-values.. -.4 (-3.882) = 1.5528 -.2 (-1.962) = .3924 0 (-.302) = 0 .2 (2.128) = .4256 .4 (3.998) = 1.5992
Howard-Wolowitz
  • Howard-Wolowitz
i got the same y's
xMissAlyCatx
  • xMissAlyCatx
Now you square your x's and y's.. x-values -.4 squared = .16 -.2 squared = .04 0 squared = 0 .2 squared = .04 .4 squared = .16 y-values -3.882 squared = 15.069924 -1.962 squared = 3.849444 -.302 squared = .091204 2.128 squared = 4.528384 3.998 squared = 15.984004
Howard-Wolowitz
  • Howard-Wolowitz
then you add them i think???
xMissAlyCatx
  • xMissAlyCatx
Now add up your the x(y)'s the x-squared's and the y-squared's The x(y)'s added up is = 3.97 The x-squared's added up is = .4 The y-squared's added up is = 39.52296
xMissAlyCatx
  • xMissAlyCatx
|dw:1449590324224:dw|
xMissAlyCatx
  • xMissAlyCatx
Which gives you 0.99847175 :)
Howard-Wolowitz
  • Howard-Wolowitz
awesome thanks for helping me

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