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JozelynW

  • one year ago

Two ocean beaches are being affected by erosion. The table shows the width, in feet, of each beach at high tide measured where 1995 is represented by year 0.

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  1. JozelynW
    • one year ago
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    Describe the patterns shown by the erosion data measurements shown for each of the beaches in the table. Between which years will the beaches have approximately the same width? Assuming these rates remain constant, what can you do to get a better approximation of when the two beaches will have the same width?

  2. JozelynW
    • one year ago
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    Year number Western Beach width (in feet) Dunes Beach width (in feet) 0 100 20 5 90 45 10 80 70 11 78 75 12 76 80 15 70 95

  3. JozelynW
    • one year ago
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    @peachpi please helppp

  4. CBARREDO1
    • one year ago
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    Western Beach is losing sand, Dunes beach is gaining sand. Between 11 and 12 years Plot the data against time and draw a curve that goes through the data. Where the two lines cross is the time when both beaches are the same width.

  5. JozelynW
    • one year ago
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    ok i think you are correct does anyone agree with him.

  6. JozelynW
    • one year ago
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    I don't need to get anything wrong

  7. anonymous
    • one year ago
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    @CBARREDO1 is correct

  8. JozelynW
    • one year ago
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    ok thanks

  9. JozelynW
    • one year ago
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    You are such a great person I always count on you to help me with me with math @peachpi thanks a lot.

  10. anonymous
    • one year ago
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    You're welcome. Thank you! I appreciate that :)

  11. CBARREDO1
    • one year ago
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    I feel left out here ;-;

  12. JozelynW
    • one year ago
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    and thanks to you as well c

  13. JozelynW
    • one year ago
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    so @CBARREDO1 is this your paper or did you just do this tooday

  14. JozelynW
    • one year ago
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    because i don't want to copy

  15. anonymous
    • one year ago
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    @CBARREDO1 don't feel left out. you did all the hard work! :)

  16. JozelynW
    • one year ago
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    yea definitely i just messaged him

  17. CBARREDO1
    • one year ago
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    what paper are you talking about?

  18. JozelynW
    • one year ago
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    the problem response you gave me

  19. CBARREDO1
    • one year ago
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    No, I just analyzed, where could I copy it from xD?

  20. JozelynW
    • one year ago
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    @CBARREDO1 how would i graph this on geogbra

  21. JozelynW
    • one year ago
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    any one knows

  22. CBARREDO1
    • one year ago
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    What's geogbra?

  23. JozelynW
    • one year ago
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    ldo you know what is desmos

  24. JozelynW
    • one year ago
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    @peachpi do you know how to graph on geogbra

  25. JozelynW
    • one year ago
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    or desmos

  26. CBARREDO1
    • one year ago
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    I know desmos

  27. JozelynW
    • one year ago
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    ok how on desmos. i don't know hot to graph point only equations

  28. anonymous
    • one year ago
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    sorry I don't know geobra. I don't really know how to do points on desmos.

  29. JozelynW
    • one year ago
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    cant be mad cause i don't know either.

  30. anonymous
    • one year ago
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    you can make equations for the lines by hand or use wolframalpha to get the line between points. then graph the lines on desmos

  31. JozelynW
    • one year ago
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    ok let me see

  32. JozelynW
    • one year ago
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    im on the website and i dont know where to go

  33. anonymous
    • one year ago
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    Go to wolframalpha.com There should be a box to type in. Enter this to get an equation for the first beach: line through (0,100) and (5,90)

  34. JozelynW
    • one year ago
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    k

  35. JozelynW
    • one year ago
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    it says y=100-2x

  36. JozelynW
    • one year ago
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    well is their another 2 point to do?

  37. CBARREDO1
    • one year ago
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    put that equation in desmos, and then the line comes do the same for the next

  38. anonymous
    • one year ago
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    ^yep

  39. JozelynW
    • one year ago
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    wait but aren't we trying to figure out the approx for year 11 and 12

  40. JozelynW
    • one year ago
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    when they will be the same width

  41. JozelynW
    • one year ago
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    approximation of when the two beaches will have the same width?

  42. anonymous
    • one year ago
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    that's why you're graphing them. once you have the lines graphed you're looking for the intersection point, which will be between 11 and 12

  43. JozelynW
    • one year ago
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    but 0,100 is is year 0 while 5,90 is year 5. Year 11 and 12 are the closest, so should't we be doing year 11 and 12 then finding where intersection point is?

  44. JozelynW
    • one year ago
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    and how will we have two lines

  45. JozelynW
    • one year ago
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    please talk back

  46. JozelynW
    • one year ago
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    @peachpi WHAT HAPPENED

  47. anonymous
    • one year ago
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    sorry didn't realize you had posted something here. You're going to have 2 different equations, one for each beach. We found the first equation is y = 100 - 2x. Find the second one using 2 points from the other beach, like (0, 20) and (5,45). As far as choosing 11 and 12, it doesn't matter. It takes 2 points to define a line, it doesn't matter which two points you use. You can use the points that correspond to 11 and 12 and the results will be the same. I just picked the two I chose because they were the top two points.

  48. JozelynW
    • one year ago
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    I COPY AND PASTED JUST AS IT IS HERE SO IT IS Y=5X+20 sorry about caps

  49. anonymous
    • one year ago
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    ok. so the two lines you're going to graph are y = 5x + 20 and y = 100-2x

  50. anonymous
    • one year ago
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    and you're looking for the intersection point

  51. JozelynW
    • one year ago
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    it is (11.43,77.14)

  52. anonymous
    • one year ago
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    yes

  53. JozelynW
    • one year ago
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    ok thank you

  54. anonymous
    • one year ago
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    youre welcome

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