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Help? Please and thank you! What is the y coordinate of the y−intercept of the line that passes through the points
(−3, −1) and (1, 7)?
 8 months ago
 8 months ago
Help? Please and thank you! What is the y coordinate of the y−intercept of the line that passes through the points (−3, −1) and (1, 7)?
 8 months ago
 8 months ago

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OpenSessameBest ResponseYou've already chosen the best response.1
3 1 1 7dw:1377494318035:dw
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
You have to find the slope of the line!
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
Slope is...\[\frac{ RISE }{ RUN }\]
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
Lagging is my life.
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
would that be equal to 1/2 for slope? or no?
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
Well, what is my question asking for? the y coordinate?
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
Yes! To find where the line crosses the Y axes!
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
2, 0? Random guess. Lol
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
\[y – y _{1} = m(x – x _{1})\]
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
Now using that formula I gave you plug in one of the Points that are given and solve for y.
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
Not exactly...Only use one set of points and plug it into the y and x with a tiny 1...
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
More like... y+1= M(x+3)
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
And M means slope so plug that in too!
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
Yup, now solve for Y.
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
This form is call slope intercept form. To find y plug in 0 for X.
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
y = 1/2(0) + 1/2 y = 1/2 ?
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
Now, this will be tricky to put in the written response, because fractions turn from 1/2 to 12. Lol. Should I just put 0.5?
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
Wait...before you write it lets check it...cause something doesnt seem right...
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
I feel like it should be a whole number, my teacher said it should be for these ones.
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
I think is should be (0,5)...
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
@mathstudent55 Maybe they know if we did anything wrong.
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
we have to redo that with the slope of 2.
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
Because its Y/X not X/Y.
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
OpenStudy is lagging for me.
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
Its okay! it is (0,5)
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
@Luigi0210 I really need to know if he's right. I'm so confused.
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
Sorry for confusing you...:(
 8 months ago

OpenSessameBest ResponseYou've already chosen the best response.1
http://www.webmath.com/_answer.php Its right, check...
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
Only if OpenStudy was a real person...
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
So you're just looking for the ycoordinate of the y intercept?
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Well you know that the yintercept is when x=0 right?
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
Yes, but now I don't even know what the slope is anymore. 1/2 or 2 or 5 lol.
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Slope is: \[m=\frac{y2y1}{x2x1}\]
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
1  7  3  1 ?
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Just plug them in and solve. and either way works, you get the same answer
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Yup, making the slope 2. Now we plug that information into the pointslope formula: yy1=m(xx1)
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Open was right so far, except for the slope
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Yea, not just distribute.
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Now we find the yintercept Meaning that we plug in where ever there is an x. This will give us the y value we are looking for.
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
What do we use for x? What number?
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
13......let me type please OpenStudy please...
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Ah, plug 0 in for x, not y
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
y = 2(0)  13 y = 13?
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Yup, and that's it Mikeyy :)
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
I feel like that would be one weird yintercept from where the two dots are on a graph..
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Your ordered pair is (13, 0)
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
Lol. Answer wasn't 13 but I still got a 88. and I have a chance to get a 90 with my written response...
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Yes I was about to say that.. sorry buddy :( I just realized that we used the wrong points for the pointslope formula.
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
The answer was actually (0, 5) and the equation was y=2x+5
 8 months ago

Mikeyy1992Best ResponseYou've already chosen the best response.0
It's fine. I had to get over a 60 and I did. So, I'm happy. I need to get off OP before it screws me another time. thanks again
 8 months ago

Luigi0210Best ResponseYou've already chosen the best response.1
Alright, and you're welcome :)
 8 months ago
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