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ayeeeitskateee

  • one year ago

Write an equation of the line, in point-slope form, that passes through the two points (-2, 15) and (9, -18) Please explain this to me so I can jot it down in my notebook for future reference. Will medal/fan as always.

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  1. pooja195
    • one year ago
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    Find the slope first \[\LARGE \frac{y_2-y_1}{x_2-x_1}=slope\]

  2. pooja195
    • one year ago
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    If you need help finding the slope let me know.

  3. ayeeeitskateee
    • one year ago
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    Hold on. Let me write it. :)

  4. pooja195
    • one year ago
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    :) ok

  5. ayeeeitskateee
    • one year ago
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    18+15 over 9-2?

  6. ayeeeitskateee
    • one year ago
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    -18, sorry.

  7. ayeeeitskateee
    • one year ago
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    -3/7 is what I got.

  8. ayeeeitskateee
    • one year ago
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    The book gives me these answer choices and I'm totally not sure. y-2=-3(x-15) y-2=-1/3(x+15) y-15=-3(x+2) y-15=-1/3(x+2) What does the x+ a number mean? :(

  9. pooja195
    • one year ago
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    \[\LARGE \frac{-18-15}{9--2}=slope\] \[\LARGE \frac{-18-15}{9+2}=\frac{- 3 }{ 11 }\]

  10. ayeeeitskateee
    • one year ago
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    Oh. - 15. I did +15.

  11. pooja195
    • one year ago
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    Well a negative + negative makes the plus sign its just 15 not -15 so its just -3 same thing with the bottom it was 9--2 right? so i just added the 2 to get 11

  12. pooja195
    • one year ago
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    Next step \[\huge y-y_1=m(x-x_1)\] where m=slope (x1,y1)

  13. ayeeeitskateee
    • one year ago
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    I understand how the formula goes. I just haven't used it in a few years. lol. But thank you for refreshing my memory. Anyways, I got y-15=-3/11(x-2) and that's not a choice. :( Is there another step?

  14. pooja195
    • one year ago
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    What are your choices?

  15. ayeeeitskateee
    • one year ago
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    I have already said them above. Let me copy paste. :)

  16. ayeeeitskateee
    • one year ago
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    The book gives me these answer choices and I'm totally not sure. y-2=-3(x-15) y-2=-1/3(x+15) y-15=-3(x+2) y-15=-1/3(x+2) What does the x+ a number mean? :( thats what I said. My choices are those 4.

  17. pooja195
    • one year ago
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    Like i said before the 2 is a negative 2 if two negative signs are next to each other they become postivie

  18. ayeeeitskateee
    • one year ago
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    Okay, what about the slope? It doesnt match up.. or maybe I just suck at math. lol.

  19. pooja195
    • one year ago
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    \(\color{#0cbb34}{\text{Originally Posted by}}\) @ayeeeitskateee I understand how the formula goes. I just haven't used it in a few years. lol. But thank you for refreshing my memory. Anyways, I got y-15=-3/11(x-2) and that's not a choice. :( Is there another step? \(\color{#0cbb34}{\text{End of Quote}}\) \[\huge~\rm~y-15=-3/11(x-2) \] \[\huge~\rm~y-15=-3/11(x-(\huge\color{red}{-}2) \]

  20. pooja195
    • one year ago
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    Ok lets redo the slope hold on \[\LARGE \frac{-18-15}{9--2}=slope\] \[\LARGE \frac{-18-15}{9+2}=\frac{- 33 }{ 11 }\]

  21. pooja195
    • one year ago
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    We can simplfy the slope (we made a mistake earlier -18-15=-33 not -3 )

  22. ayeeeitskateee
    • one year ago
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    -3?

  23. ayeeeitskateee
    • one year ago
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    for the slope?

  24. pooja195
    • one year ago
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    Yep

  25. pooja195
    • one year ago
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    So what would our final answer be? (which answer choice) ?

  26. ayeeeitskateee
    • one year ago
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    C. :)

  27. ayeeeitskateee
    • one year ago
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    y-15=-3(x+2)

  28. pooja195
    • one year ago
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    Well done :)

  29. ayeeeitskateee
    • one year ago
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    Thank you so much. it's rare somebody can help as much as you did!!

  30. pooja195
    • one year ago
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    awee :') thanks let me know if you need more help! :D

  31. ayeeeitskateee
    • one year ago
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    Will do. :)

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