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Tennistar

  • one year ago

How do you find the slope and y-intercept of this graph? (Graph posted in comments)

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  1. Tennistar
    • one year ago
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    http://learn.flvs.net/webdav/assessment_images/educator_algebraII_v14/01_09_13e.gif

  2. Vocaloid
    • one year ago
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    link doesn't work, maybe try posting a screenshot?

  3. Tennistar
    • one year ago
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  4. jim_thompson5910
    • one year ago
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    Where on the y axis does the graph cross?

  5. Tennistar
    • one year ago
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    It appears a little bit past -1?

  6. Tennistar
    • one year ago
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    Wait

  7. Tennistar
    • one year ago
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    Is it -4?

  8. jim_thompson5910
    • one year ago
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    yes

  9. jim_thompson5910
    • one year ago
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    so the y intercept is -4

  10. jim_thompson5910
    • one year ago
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    making b = -4

  11. Tennistar
    • one year ago
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    Ahhh...

  12. jim_thompson5910
    • one year ago
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    can you identify 2 points on this line?

  13. Tennistar
    • one year ago
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    Yes...-1, -1 and -2, 2 I think.

  14. jim_thompson5910
    • one year ago
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    good, make sure you use parenthesis when talking about points so instead of `-1,-1` say `(-1,-1)`

  15. Tennistar
    • one year ago
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    Then I just plug them in for rise over run formula, correct?

  16. jim_thompson5910
    • one year ago
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    yeah tell me what you get

  17. Tennistar
    • one year ago
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    Ok

  18. Tennistar
    • one year ago
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    -3 I believe

  19. Tennistar
    • one year ago
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    For the slope

  20. jim_thompson5910
    • one year ago
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    yes -3/1 = -3 is your slope

  21. jim_thompson5910
    • one year ago
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    m = -3 is the slope b = -4 is the y intercept

  22. Tennistar
    • one year ago
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    Ok, thank you so much :)

  23. jim_thompson5910
    • one year ago
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    plug those into y = mx+b

  24. Tennistar
    • one year ago
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    Ok, thanks :)

  25. jim_thompson5910
    • one year ago
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    no problem

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