isuckatschool43
  • isuckatschool43
Point Slope
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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isuckatschool43
  • isuckatschool43
@sleepyjess
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sleepyjess
  • sleepyjess
Same thing as the last one :) Wanna try?
isuckatschool43
  • isuckatschool43
y - 5 = x - 3

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More answers

isuckatschool43
  • isuckatschool43
y - 5 = 2(x - 3)
isuckatschool43
  • isuckatschool43
left out the slope
isuckatschool43
  • isuckatschool43
so c
sleepyjess
  • sleepyjess
Yep :)
isuckatschool43
  • isuckatschool43
okay i get those, but i dont get this one
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isuckatschool43
  • isuckatschool43
oh wait i think i get this
sleepyjess
  • sleepyjess
First we need to find the slope, do you know how to do that? :)
isuckatschool43
  • isuckatschool43
its 1/2
sleepyjess
  • sleepyjess
Hint, there are 2 correct answers :)
isuckatschool43
  • isuckatschool43
because there are two points
sleepyjess
  • sleepyjess
Yep, and you are correct on that slope btw
isuckatschool43
  • isuckatschool43
y - 3 = 1/2 (x - 4), so A also, if the y is negative, would it become y-y1 = m(x+x1)?
isuckatschool43
  • isuckatschool43
*y1
sleepyjess
  • sleepyjess
Well, we know A can't be correct because A has a negative slope
isuckatschool43
  • isuckatschool43
oh i didnt see that lol
isuckatschool43
  • isuckatschool43
then b
sleepyjess
  • sleepyjess
Yep, and one other answer with the other point
isuckatschool43
  • isuckatschool43
y - 1 = 1/2(x + 3) so d
isuckatschool43
  • isuckatschool43
wait so how does the + get there? is it because the 3 is negative
sleepyjess
  • sleepyjess
Exactly!
isuckatschool43
  • isuckatschool43
okay thats what i thought
isuckatschool43
  • isuckatschool43
so this one looks different from the ones we already did
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isuckatschool43
  • isuckatschool43
is c right @sleepyjess
sleepyjess
  • sleepyjess
I don't see any correct as far as the y-intercept goes, but that's the closest...
isuckatschool43
  • isuckatschool43
okay, i have just one more, if you can :)
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sleepyjess
  • sleepyjess
Okay, pick 2 points on the line to start out
isuckatschool43
  • isuckatschool43
(0,1) (2,-2)
sleepyjess
  • sleepyjess
Okay, now we need to substitute those into the slope formula, \(\dfrac{y_2-y_1}{x_2-x_1}\) \(\dfrac{-2-1}{2-0}\) \(\dfrac{-3}2\)
sleepyjess
  • sleepyjess
So that's our slope
sleepyjess
  • sleepyjess
Now we have to figure out the points in each equation and see if they match to a point on the line
isuckatschool43
  • isuckatschool43
i couldnt find any that matched
sleepyjess
  • sleepyjess
Okay, well our options for points that match up are (-2, 4) and (-3, 1), are either of those points on our line?
isuckatschool43
  • isuckatschool43
(-2,4) is
sleepyjess
  • sleepyjess
Yep :)
isuckatschool43
  • isuckatschool43
y - 4 = 3/2 (x+2), so b?
sleepyjess
  • sleepyjess
Correct ^_^
isuckatschool43
  • isuckatschool43
Okay, that was it! Thank you so much for your help, I understand it now. :)
sleepyjess
  • sleepyjess
No problem! Glad I could help you understand :) Hopefully you can help someone understand this in the future ^_^
isuckatschool43
  • isuckatschool43
Bye :)

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