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teller

  • one year ago

Can someone help me to see if I got this right ?

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  1. jim_thompson5910
    • one year ago
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    what's your question?

  2. teller
    • one year ago
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  3. teller
    • one year ago
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    I just posted it

  4. jim_thompson5910
    • one year ago
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    ok one moment

  5. teller
    • one year ago
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    The help video they just gave me doesn't even tell us how to even do that kind problem it's everything else but those kind of problems

  6. teller
    • one year ago
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    I know it's going to be 1 but I can't just put 1

  7. jim_thompson5910
    • one year ago
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    are you familiar with finding the slope?

  8. teller
    • one year ago
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    Not asking for the slope though and no.

  9. jim_thompson5910
    • one year ago
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    well with finding any linear function, you find the slope first

  10. jim_thompson5910
    • one year ago
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    all linear equations are in the form y = mx+b m = slope b = y intercept

  11. teller
    • one year ago
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    See the video didn't say that...

  12. jim_thompson5910
    • one year ago
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    what is the video saying (summarize it the best you can)

  13. teller
    • one year ago
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    It was in the help section when I clicked it and it's input output tables and she just shows you how to find the missing numbers nothing about what in my work this is the video https://www.youtube.com/watch?v=y_aaOS6Q2qo

  14. jim_thompson5910
    • one year ago
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    ok let me watch it

  15. teller
    • one year ago
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    Frustrates me that they play students like this .They link a video and it's nothing on the problems about how to find N or anything like that ...

  16. jim_thompson5910
    • one year ago
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    A big vague how she says "the rule is 3" at 41 seconds

  17. teller
    • one year ago
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    Yea but when I do what she does it tells me I'm wrong on almost every single one I have to use those signs that you see on the right hand side of the picture.

  18. jim_thompson5910
    • one year ago
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    ok so the video doesn't help with finding the nth term

  19. teller
    • one year ago
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    That's what I said lol

  20. jim_thompson5910
    • one year ago
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    yeah I'm just confirming. Anyways, as the inputs increase by 1, what's going on with the outputs?

  21. teller
    • one year ago
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    its decreasing

  22. jim_thompson5910
    • one year ago
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    by how much?

  23. teller
    • one year ago
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    By 1 so the answer is going to be 1

  24. teller
    • one year ago
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    I want to put 1-n-1 but I can't or 1xn-1

  25. jim_thompson5910
    • one year ago
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    the x values (the inputs) are increasing by 1 the y values (the outputs) are decreasing by 1 (so we say -1) the slope is equal to the change in y over the change in x \[\Large \text{Slope} = \frac{\text{change in y}}{\text{change in x}}\] \[\Large \text{Slope} = \frac{-1}{1}\] \[\Large \text{Slope} = -1\] make sense?

  26. teller
    • one year ago
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    so it would be -1 over 1?

  27. jim_thompson5910
    • one year ago
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    yes which reduces to -1

  28. teller
    • one year ago
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    so the final answer is -1 over 1 - 1? or just -1 over 1

  29. jim_thompson5910
    • one year ago
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    -1 is just part of the answer

  30. jim_thompson5910
    • one year ago
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    m = -1 is our slope. It tells us how things are changing

  31. jim_thompson5910
    • one year ago
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    pick any pair of input and output values say x = 1 and y = 5 we will plug m = -1, x = 1 and y = 5 into y = mx+b and solve for b

  32. jim_thompson5910
    • one year ago
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    y = mx+b y = -1*x+b ... replace m with -1 y = -1*1+b ... replace x with 1 5 = -1*1+b ... replace y with 5 now solve for b

  33. teller
    • one year ago
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    6?

  34. jim_thompson5910
    • one year ago
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    yep

  35. jim_thompson5910
    • one year ago
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    m = -1 and b = 6 so y = mx+b turns into y = -1*x + 6 which is simplified to y = -x+6

  36. jim_thompson5910
    • one year ago
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    now if you replace the x with n (changing variables is perfectly valid) we go from `-x+6` to `-n+6`

  37. teller
    • one year ago
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    so the final answer is -n+6?

  38. jim_thompson5910
    • one year ago
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    so the nth term is `-n+6` example: replace n with 4 and you'll get `-n+6=-4+6 = 2` which is exactly the output for the input of 4

  39. jim_thompson5910
    • one year ago
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    correct

  40. teller
    • one year ago
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    Thank you!

  41. jim_thompson5910
    • one year ago
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    you're welcome

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