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onegirl Group Title

Match the graphs of the functions on the left with the graphs of their derivatives on the right.

  • one year ago
  • one year ago

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  1. onegirl Group Title
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    • one year ago
  2. onegirl Group Title
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    • one year ago
  3. onegirl Group Title
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    • one year ago
  4. ZeHanz Group Title
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    Do you know what the derivative of a 2nd degree function is?

    • one year ago
  5. onegirl Group Title
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    no

    • one year ago
  6. ZeHanz Group Title
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    You know the following I guess: If f is decreasing, then f' is negative (and vice versa). If f is increasing, then f' is positive ( and vv).

    • one year ago
  7. onegirl Group Title
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    yes

    • one year ago
  8. ZeHanz Group Title
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    No look at the first graph on the left. To the left of the y-axis, it is decreasing, to the right it is increasing.

    • one year ago
  9. onegirl Group Title
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    yes it does

    • one year ago
  10. ZeHanz Group Title
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    This means, for f' you are looking for a function that is negative on the left side of the y-axis and positive on the right.

    • one year ago
  11. onegirl Group Title
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    ok

    • one year ago
  12. onegirl Group Title
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    so it will be #2 in the second attachment?

    • one year ago
  13. ZeHanz Group Title
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    I can see it on one of your drawings on the right! Do you?

    • one year ago
  14. onegirl Group Title
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    Yes it will be number 2 ?

    • one year ago
  15. onegirl Group Title
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    so to will have letter A

    • one year ago
  16. ZeHanz Group Title
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    No, I've got C

    • one year ago
  17. onegirl Group Title
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    but you can't match a with c , it says to match the left with the right so it has to be a letter with a number

    • one year ago
  18. ZeHanz Group Title
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    I mean this (see image) The parabola on the left (2nd degree function) has the straight line on the right as it's derivative.

    • one year ago
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  19. onegirl Group Title
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    so number one will be 1 with letter c?

    • one year ago
  20. onegirl Group Title
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    I meant number 2 sorry

    • one year ago
  21. onegirl Group Title
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    so 2C ?

    • one year ago
  22. ZeHanz Group Title
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    Yes

    • one year ago
  23. onegirl Group Title
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    okay

    • one year ago
  24. ZeHanz Group Title
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    Now try #2. See what it does: increasing, decreasing, increasing. So you're looking for a graph that is +, then -, then +.

    • one year ago
  25. onegirl Group Title
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    i thought we already did number 2

    • one year ago
  26. onegirl Group Title
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    ?

    • one year ago
  27. zepdrix Group Title
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    He was telling you number #1 is C. There musta been some confusion there c:

    • one year ago
  28. onegirl Group Title
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    ohhh okay lol sorry

    • one year ago
  29. onegirl Group Title
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    so number 2 will be f?

    • one year ago
  30. ZeHanz Group Title
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    @zepdrix: thx

    • one year ago
  31. ZeHanz Group Title
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    Yes!

    • one year ago
  32. onegirl Group Title
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    okay :)

    • one year ago
  33. ZeHanz Group Title
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    I think you got it!

    • one year ago
  34. onegirl Group Title
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    number 3 looks funny

    • one year ago
  35. zepdrix Group Title
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    I think #2 is `e` actually :o hmm

    • one year ago
  36. ZeHanz Group Title
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    It is down, up, down, up, so look for -,+,-,+

    • one year ago
  37. onegirl Group Title
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    okay so number 3 will be A ?

    • one year ago
  38. ZeHanz Group Title
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    @zepdrix : you're right, I'm having trouble looking at three different pictures, @onegirl: sorry ;)

    • one year ago
  39. onegirl Group Title
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    okay thanks for the correction zep

    • one year ago
  40. onegirl Group Title
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    so 3A ?

    • one year ago
  41. ZeHanz Group Title
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    Yes, 3A

    • one year ago
  42. onegirl Group Title
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    okay

    • one year ago
  43. onegirl Group Title
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    so number 4 will be D?

    • one year ago
  44. ZeHanz Group Title
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    Right again! Always decreasing, so looking for a derivative that is always negative...

    • one year ago
  45. onegirl Group Title
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    okay

    • one year ago
  46. onegirl Group Title
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    so i'm guessing number 5 will be 5B?

    • one year ago
  47. onegirl Group Title
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    ?

    • one year ago
  48. ZeHanz Group Title
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    You guessed wrong... Look at graph #5 and compare with #3

    • one year ago
  49. ZeHanz Group Title
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    It behaves in the same way: dec, inc, dec, inc, so -,+,-,+

    • one year ago
  50. onegirl Group Title
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    ok so it will be 5f

    • one year ago
  51. ZeHanz Group Title
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    Oops, look something went wrong with my last response. Because 5 and 3 behave in the same way, you have to choose the same derivative: 5A

    • one year ago
  52. onegirl Group Title
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    ohh ok

    • one year ago
  53. onegirl Group Title
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    so letter A goes to two graphs? okay

    • one year ago
  54. ZeHanz Group Title
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    That's the mean part of the question ;)

    • one year ago
  55. onegirl Group Title
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    okay so how about the last one number 6?

    • one year ago
  56. ZeHanz Group Title
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    It goes down, then up, then down, so for f' we have: neg, pos, neg

    • one year ago
  57. onegirl Group Title
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    so it will be 6B

    • one year ago
  58. ZeHanz Group Title
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    No, that goes a lot more from - to + etc.

    • one year ago
  59. ZeHanz Group Title
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    (it is really simple)

    • one year ago
  60. onegirl Group Title
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    ohh so it will f since it does go negative pos then neg

    • one year ago
  61. ZeHanz Group Title
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    Yes, it's 6F. I must admit this kind of question can be confusing, because you constantly have to switch from increasing , decreasing to +, -.

    • one year ago
  62. onegirl Group Title
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    okay well thanks for your help

    • one year ago
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