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anonymous

  • 4 years ago

How do you write an equation in slope-intercept form for(-2,1); m=1

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  1. KatrinaKaif
    • 4 years ago
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    Plug it into the equation: (y-y1) = m (x-x1) as (-2,1) = (x1,y1) and m = 1

  2. anonymous
    • 4 years ago
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    you're just getting people to do your homework, this question is the exact same as the last one you asked. You know these people won't be here when it comes test time

  3. KatrinaKaif
    • 4 years ago
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    Can you solve that for me Mira? I can guide you through.

  4. anonymous
    • 4 years ago
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    okay so, 1= 1(-2) +b right?

  5. KatrinaKaif
    • 4 years ago
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    (y- 1) = 1 (x- (-2) y - 1 = 1 (x + 2) y - 1 = 1x + 2 y = 1x +1

  6. anonymous
    • 4 years ago
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    wait what D: I'm so confused.

  7. KatrinaKaif
    • 4 years ago
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    Haha, okay lets take it step by step.

  8. KatrinaKaif
    • 4 years ago
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    The equation we plug these in is: (y -y1) = m (x-x1) The given points are: (-2, 1) which substitutes as (x1,y1) If we put it all together, we get: (y - 1) = m (x - (-2) Understood?

  9. anonymous
    • 4 years ago
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    Yes okay..

  10. anonymous
    • 4 years ago
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    equation is y=mx+b << u have (-2,1), which is x=-2, y=1, and m=1.... plug back in--- 1=1(-2)+b, solve for b, u get b=3, then rewrite, y=1x+3

  11. KatrinaKaif
    • 4 years ago
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    Now lets plug in for m as well, giving us: (y - 1) = 1 (x - (-2)

  12. KatrinaKaif
    • 4 years ago
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    (y- 1) = 1 (x + 2) is what it becomes when simplified.

  13. anonymous
    • 4 years ago
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    yeah so 1=1x-2?

  14. anonymous
    • 4 years ago
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    im not following ur way, katrina..... u lost me lol

  15. KatrinaKaif
    • 4 years ago
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    First: You forgot about the "y" before 1 = 1x - 2

  16. KatrinaKaif
    • 4 years ago
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    Second: Its y - 1 = 1x + 2 (1x PLUS 2)

  17. anonymous
    • 4 years ago
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    (y- 1) = 1 (x- (-2) y - 1 = 1 (x + 2) y - 1 = 1x + 2 <<<sign error y = 1x +1 << should be y=1x+3?

  18. KatrinaKaif
    • 4 years ago
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    Lol Yep.

  19. anonymous
    • 4 years ago
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    got cha, i think the equation y=mx+b is way easier to remember

  20. KatrinaKaif
    • 4 years ago
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    Hmm, but you have to begin with : (y-y1) = m (x-x1)

  21. anonymous
    • 4 years ago
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    OH I UNDERSTAND THANK YOU!!!!!!

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