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Mikeyy1992
 2 years 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)?
Mikeyy1992
 2 years 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)?

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OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.13 1 1 7dw:1377494318035:dw

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1You have to find the slope of the line!

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1Slope is...\[\frac{ RISE }{ RUN }\]

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0would that be equal to 1/2 for slope? or no?

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0Well, what is my question asking for? the y coordinate?

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1Yes! To find where the line crosses the Y axes!

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.02, 0? Random guess. Lol

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1\[y – y _{1} = m(x – x _{1})\]

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

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

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1More like... y+1= M(x+3)

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1And M means slope so plug that in too!

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1Yup, now solve for Y.

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1This form is call slope intercept form. To find y plug in 0 for X.

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0y = 1/2(0) + 1/2 y = 1/2 ?

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0Now, 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?

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1Wait...before you write it lets check it...cause something doesnt seem right...

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0I feel like it should be a whole number, my teacher said it should be for these ones.

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1I think is should be (0,5)...

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0@mathstudent55 Maybe they know if we did anything wrong.

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1we have to redo that with the slope of 2.

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1Because its Y/X not X/Y.

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0OpenStudy is lagging for me.

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1Its okay! it is (0,5)

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0@Luigi0210 I really need to know if he's right. I'm so confused.

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1Sorry for confusing you...:(

OpenSessame
 2 years ago
Best ResponseYou've already chosen the best response.1http://www.webmath.com/_answer.php Its right, check...

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0Only if OpenStudy was a real person...

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1So you're just looking for the ycoordinate of the y intercept?

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Well you know that the yintercept is when x=0 right?

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0Yes, but now I don't even know what the slope is anymore. 1/2 or 2 or 5 lol.

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Slope is: \[m=\frac{y2y1}{x2x1}\]

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.01  7  3  1 ?

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Just plug them in and solve. and either way works, you get the same answer

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Yup, making the slope 2. Now we plug that information into the pointslope formula: yy1=m(xx1)

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Open was right so far, except for the slope

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Yea, not just distribute.

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Now 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.

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0What do we use for x? What number?

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.013......let me type please OpenStudy please...

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Ah, plug 0 in for x, not y

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0y = 2(0)  13 y = 13?

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Yup, and that's it Mikeyy :)

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0I feel like that would be one weird yintercept from where the two dots are on a graph..

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Your ordered pair is (13, 0)

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0Lol. Answer wasn't 13 but I still got a 88. and I have a chance to get a 90 with my written response...

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Yes I was about to say that.. sorry buddy :( I just realized that we used the wrong points for the pointslope formula.

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1The answer was actually (0, 5) and the equation was y=2x+5

Mikeyy1992
 2 years ago
Best ResponseYou've already chosen the best response.0It'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

Luigi0210
 2 years ago
Best ResponseYou've already chosen the best response.1Alright, and you're welcome :)
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