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sammietaygreen

  • 3 years ago

help

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  1. sammietaygreen
    • 3 years ago
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    @jim_thompson5910

  2. jim_thompson5910
    • 3 years ago
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    What is the slope of the given line?

  3. sammietaygreen
    • 3 years ago
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    Sorry, huh?

  4. jim_thompson5910
    • 3 years ago
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    The given line, can you tell me what the slope is of it

  5. jim_thompson5910
    • 3 years ago
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    What is the slope of y + 2 = 1/3(x - 5)

  6. sammietaygreen
    • 3 years ago
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    one sec let me see

  7. jim_thompson5910
    • 3 years ago
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    If you're not sure, the slope of y - y1 = m(x - x1) is m

  8. ParthKohli
    • 3 years ago
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    Another alternative: The slope of \(y = mx + b\) is \(m\).

  9. sammietaygreen
    • 3 years ago
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    so would it be 1/3?

  10. skullpatrol
    • 3 years ago
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    In the slope-intercept form: y = mx + b you should know the slope of the line is the coefficient m of the x term, right?

  11. jim_thompson5910
    • 3 years ago
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    yep, the slope is 1/3 The slope of ANY perpendicular line is -3/1 (flip the fraction and flip the sign)

  12. jim_thompson5910
    • 3 years ago
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    -3/1 reduces to -3, so that means that the answer is either choice A or B this is because choice A and B have slopes of -3

  13. skullpatrol
    • 3 years ago
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    Where flip the fraction means find the reciprocal and flip the sign means use the opposite sign.

  14. sammietaygreen
    • 3 years ago
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    yes! I remembered that!! Alright how do we know between a and b though?

  15. jim_thompson5910
    • 3 years ago
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    Now use this to find the value of b in y = mx+b y = mx+b y = -3x + b .. plug in m = -3 (the perpendicular slope) 3 = -3(-4) + b ... plug in x = -4 and y = 3 3 = 12 + b Keep going to solve for b

  16. sammietaygreen
    • 3 years ago
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    b = 4?

  17. jim_thompson5910
    • 3 years ago
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    3 = 12 + b 3 - 12 = 12 + b - 12 -9 = b b = -9

  18. jim_thompson5910
    • 3 years ago
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    not sure how you got b = 4

  19. jim_thompson5910
    • 3 years ago
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    y = mx+b y = -3x + b .. plug in m = -3 y = -3x - 9 ... plug in b = -9 So that's your perpendicular equation

  20. sammietaygreen
    • 3 years ago
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    woah! haha I have no idea either...is it b?

  21. sammietaygreen
    • 3 years ago
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    yeah, that's what I got too. thanks!

  22. jim_thompson5910
    • 3 years ago
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    ok great, just a silly math error then I guess

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