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anonymous

  • one year ago

help please Instructions Part 1 You will need to measure five different people. Record your measurements on a piece of paper. Using a tape measure or ruler, measure the length (in inches) of a person’s left foot and then measure the length (in inches) of that same person’s forearm (between their wrist and elbow). Refer to the diagrams below. You will have two measurements for each person. (An easy way to measure the length of a foot is to have your subject stand on a piece of paper. Then, trace their foot and measure the outline once they move off the paper.)

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  1. anonymous
    • one year ago
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    To measure the forearm, measure inside the arm, between the wrist and the elbow. Part 2 Organize your data and find the rate of change. A.Create a table of the measurements for your data. Label the forearm measurements as your input and the foot measurements as your output. B.Select two sets of points and find the rate of change for your data. C.Describe your results. If you had to express this relation as a verbal statement, how would you describe it? Part 3 Compare rates of change. A.The equation below can be used to find the length of a foot or forearm when you know one or the other. (length of the foot) = 0.860 • (length of the forearm) + 3.302 If you let y = length of the foot and x = length of the forearm, this equation can be simplified to y = 0.860x + 3.302. Using this equation, how long would the foot of a person be if his forearm was 17 inches long? B.What is the rate of change of the equation from Part A? Compare the equation from Part A to your data. Are they the same? Which has a greater rate of change? Why do you think the values are different? C.Is the relation in your data a function? Why or why not? Could the equation in Part A represent a function? Why or why not? Explain your answer.

  2. jim_thompson5910
    • one year ago
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    post what you have so far

  3. anonymous
    • one year ago
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    ok here my measurements I just asked random people outside lol [img]/drawings/8c4728ebf86186b4cc1bea96def9a8d7.png[/img]

  4. jim_thompson5910
    • one year ago
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    you'll have to attach the drawing

  5. anonymous
    • one year ago
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    |dw:1437708012599:dw|

  6. jim_thompson5910
    • one year ago
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    So E is 7 inches for the left arm? and E is 8 1/2 inches for the right arm?

  7. anonymous
    • one year ago
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    its left arm and left foot for all of ( A--->E)

  8. jim_thompson5910
    • one year ago
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    oh nvm

  9. jim_thompson5910
    • one year ago
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    E is 7 inches for the left arm? E is 8 1/2 inches for the left foot?

  10. anonymous
    • one year ago
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    yes

  11. jim_thompson5910
    • one year ago
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    so they want you to make x = length of left arm and y = length of left foot?

  12. anonymous
    • one year ago
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    yes I think that's what its asking but what im stuck on is how do I put my measurements in to an input and output chart? is there a rule I have to follow? and how do I find my rate of change?

  13. jim_thompson5910
    • one year ago
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    the inputs look like the length of the arm (ie x) the outputs are the length of the foot (ie y)

  14. jim_thompson5910
    • one year ago
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    \[\Large \text{rate of change} = \frac{\text{change in y}}{\text{change in x}}\]

  15. jim_thompson5910
    • one year ago
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    |dw:1437708710614:dw|

  16. anonymous
    • one year ago
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    so like slope? what would my input/output chart look like?

  17. jim_thompson5910
    • one year ago
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    |dw:1437708739677:dw|

  18. jim_thompson5910
    • one year ago
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    yeah rate of change = slope

  19. jim_thompson5910
    • one year ago
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    you either use the data you gathered or this equation they give you (length of the foot) = 0.860 • (length of the forearm) + 3.302

  20. anonymous
    • one year ago
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    ok so let me see if I got the gist of it my entire input and output chart is above and to find the rate of change I plug both the input and ouput into the equation you gave? to get the final result ( part 3) of my question? o.o

  21. jim_thompson5910
    • one year ago
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    it says `B.Select two sets of points and find the rate of change for your data. ` so you can select say these two points |dw:1437708968206:dw| find the difference in y, then the difference in x, then divide (y over x) to get the slope

  22. anonymous
    • one year ago
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    so this--> 8-7/7 1/2-6 1/2 = 1/1 =1 as my slope?

  23. jim_thompson5910
    • one year ago
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    correct

  24. anonymous
    • one year ago
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    now that I got the slope what do I do with it?

  25. jim_thompson5910
    • one year ago
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    well that's all they want for part B

  26. jim_thompson5910
    • one year ago
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    `C.Describe your results. If you had to express this relation as a verbal statement, how would you describe it? ` hint: y = mx+b m = slope b = y intercept

  27. anonymous
    • one year ago
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    y=1x+b how do I choose/find my b intercept?

  28. jim_thompson5910
    • one year ago
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    you plug in any (x,y) point you used to find the slope

  29. jim_thompson5910
    • one year ago
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    |dw:1437709744884:dw|