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anonymous

  • 5 years ago

Suppose that a certain strain of pea plant requires 14 days to reach a height of 6 inches and 30 days to reach a height of 16 inches. How many days would it take a plant of this strain to reach a height of 12 inches? * i got 15 days, am i right? *

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  1. anonymous
    • 5 years ago
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    Let's just check with the steps, Did you get m ?

  2. anonymous
    • 5 years ago
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    m?

  3. anonymous
    • 5 years ago
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    the slope :)

  4. anonymous
    • 5 years ago
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    ohh, noo i just cross multiplied and divided (:

  5. anonymous
    • 5 years ago
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    It's okay, you must find the slope to find the equation of the line :) m = y2-y2/x2-x1 after that, choose any of the given points to plug in the following equation : y - yo= m(x-xo) :)

  6. anonymous
    • 5 years ago
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    oh wait a min, wasn't the question find the linear equation?.-.

  7. anonymous
    • 5 years ago
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    noo (:

  8. anonymous
    • 5 years ago
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    oh dear, but you wrote that in the previous one >_< lol

  9. anonymous
    • 5 years ago
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    the other one was, but not this one lol

  10. anonymous
    • 5 years ago
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    oh okay, then you have to use the equation you got in the previous question then plug in x to find y :) since we said that y = height x = number of days when you plug in x, you'll get y, that's it ^_^

  11. anonymous
    • 5 years ago
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    wait what

  12. anonymous
    • 5 years ago
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    so you have an equation in the form of : y = mx + B <-- from the previous question plug in y = 12, to get x = number of days ^_^

  13. anonymous
    • 5 years ago
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    what what? ._.

  14. anonymous
    • 5 years ago
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    ohh dont worry, I guess that the question forgot to put "assume a linear eqn "

  15. anonymous
    • 5 years ago
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    lol , anyhow, did you understand what you have to do now bailey ? ^_^

  16. anonymous
    • 5 years ago
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    because otherwise you would assume expxonential growth , but im assuming the asker hasnt done that yet :P

  17. anonymous
    • 5 years ago
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    >_> :P

  18. anonymous
    • 5 years ago
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    do you know what to do now bailey? :)

  19. anonymous
    • 5 years ago
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    kind of (:

  20. anonymous
    • 5 years ago
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    :) not convincing me here lol Alright, did you find the equation from the previous question? :)

  21. anonymous
    • 5 years ago
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    from this question i got y=x+12

  22. anonymous
    • 5 years ago
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    :)

  23. anonymous
    • 5 years ago
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    alright, now we said that x = represents the number of days right? and y =height, right?

  24. anonymous
    • 5 years ago
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    yepp!

  25. anonymous
    • 5 years ago
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    alright then, the question wants to know how many days would it take a plant to reach 12 inches right? so in this case y = 12, all you'vegot to do is plug it in the equation and find x^_^

  26. anonymous
    • 5 years ago
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    got it? :)

  27. anonymous
    • 5 years ago
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    so to find x, what would i have to do, combine like trems? or no.

  28. anonymous
    • 5 years ago
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    nope you have : y = x + 12 where x = days and y = height = 12 12 = x + 12 x = 0....hmm there's something wrong, are you sure of your equation?

  29. anonymous
    • 5 years ago
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    no :/

  30. anonymous
    • 5 years ago
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    (14,6) ( 30,16) m = (16-6) / (30-14) = (5/8)

  31. anonymous
    • 5 years ago
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    m = y2-y1/x2-x1 m = (16-6)/(30 - 14) m = 0.625

  32. anonymous
    • 5 years ago
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    taake the first point

  33. anonymous
    • 5 years ago
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    y-6 = (5/8) ( x-14)

  34. anonymous
    • 5 years ago
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    so it's y=5/8x+12??????????

  35. anonymous
    • 5 years ago
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    y= (5/8)x -(11/4)

  36. anonymous
    • 5 years ago
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    now plug this in the following : y - yo= m(x-xo) <-- choose any point: y - 12 = 0.625(x-30) y = 0.625x - 6.75

  37. anonymous
    • 5 years ago
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    we are both wrong I think

  38. anonymous
    • 5 years ago
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    that is your equation, now plug in the 12 inches to find the number of days : 12 = 0.625x - 6.75 0.625x = 18.75 x = 30 So it takes 30 days? .-. LOL there's something wrong >_<?

  39. anonymous
    • 5 years ago
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    IKR i couldnt find the answer either

  40. anonymous
    • 5 years ago
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    what are we missing o_o?

  41. anonymous
    • 5 years ago
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    wait I am right :P

  42. anonymous
    • 5 years ago
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    IDK (: lol

  43. anonymous
    • 5 years ago
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    y= (5/8)x -(11/4)

  44. anonymous
    • 5 years ago
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    are you sure x = represents the number of days?, oh so my answer is true? LOL

  45. anonymous
    • 5 years ago
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    ^ thats right

  46. anonymous
    • 5 years ago
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    same thing, but mine is in decimal lol, but wait 11/4?

  47. anonymous
    • 5 years ago
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    12 = (5/8)x -11/4 (5/8)x = 14.75 x= (8/5) * 14.75 = 23.6 days

  48. anonymous
    • 5 years ago
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    which makes sense, its half way between 14 and 30

  49. anonymous
    • 5 years ago
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    about

  50. anonymous
    • 5 years ago
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    oh right >_< I've put 12 insteadof 16, sorry sorry , thank you elec ^_^"

  51. anonymous
    • 5 years ago
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    I always miss something o_o, my apologies ^_^

  52. anonymous
    • 5 years ago
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    thanks darlings, your AMAZING (:

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