ayeeeitskateee
  • ayeeeitskateee
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.
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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pooja195
  • pooja195
Find the slope first \[\LARGE \frac{y_2-y_1}{x_2-x_1}=slope\]
pooja195
  • pooja195
If you need help finding the slope let me know.
ayeeeitskateee
  • ayeeeitskateee
Hold on. Let me write it. :)

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pooja195
  • pooja195
:) ok
ayeeeitskateee
  • ayeeeitskateee
18+15 over 9-2?
ayeeeitskateee
  • ayeeeitskateee
-18, sorry.
ayeeeitskateee
  • ayeeeitskateee
-3/7 is what I got.
ayeeeitskateee
  • ayeeeitskateee
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? :(
pooja195
  • pooja195
\[\LARGE \frac{-18-15}{9--2}=slope\] \[\LARGE \frac{-18-15}{9+2}=\frac{- 3 }{ 11 }\]
ayeeeitskateee
  • ayeeeitskateee
Oh. - 15. I did +15.
pooja195
  • pooja195
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
pooja195
  • pooja195
Next step \[\huge y-y_1=m(x-x_1)\] where m=slope (x1,y1)
ayeeeitskateee
  • 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?
pooja195
  • pooja195
What are your choices?
ayeeeitskateee
  • ayeeeitskateee
I have already said them above. Let me copy paste. :)
ayeeeitskateee
  • ayeeeitskateee
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.
pooja195
  • pooja195
Like i said before the 2 is a negative 2 if two negative signs are next to each other they become postivie
ayeeeitskateee
  • ayeeeitskateee
Okay, what about the slope? It doesnt match up.. or maybe I just suck at math. lol.
pooja195
  • pooja195
\(\color{#0cbb34}{\text{Originally Posted by}}\) @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? \(\color{#0cbb34}{\text{End of Quote}}\) \[\huge~\rm~y-15=-3/11(x-2) \] \[\huge~\rm~y-15=-3/11(x-(\huge\color{red}{-}2) \]
pooja195
  • pooja195
Ok lets redo the slope hold on \[\LARGE \frac{-18-15}{9--2}=slope\] \[\LARGE \frac{-18-15}{9+2}=\frac{- 33 }{ 11 }\]
pooja195
  • pooja195
We can simplfy the slope (we made a mistake earlier -18-15=-33 not -3 )
ayeeeitskateee
  • ayeeeitskateee
-3?
ayeeeitskateee
  • ayeeeitskateee
for the slope?
pooja195
  • pooja195
Yep
pooja195
  • pooja195
So what would our final answer be? (which answer choice) ?
ayeeeitskateee
  • ayeeeitskateee
C. :)
ayeeeitskateee
  • ayeeeitskateee
y-15=-3(x+2)
pooja195
  • pooja195
Well done :)
ayeeeitskateee
  • ayeeeitskateee
Thank you so much. it's rare somebody can help as much as you did!!
pooja195
  • pooja195
awee :') thanks let me know if you need more help! :D
ayeeeitskateee
  • ayeeeitskateee
Will do. :)

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