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Mathematics 8 Online
OpenStudy (anonymous):

I need help! Will medal and fan with testimonial! No straight up answers please.

OpenStudy (anonymous):

Here is link to problem I need help with http://i.imgur.com/fgRmRoV.png

OpenStudy (jdoe0001):

pick two points on the line first so we can use that

OpenStudy (anonymous):

Okay what about 4,5 and 2,3

OpenStudy (jdoe0001):

the line doesn't seem to touch those points though goes close by, but doesn't seem those points are ON the line

OpenStudy (anonymous):

OHH sorry

OpenStudy (anonymous):

2,2 and 4,5?

OpenStudy (jdoe0001):

same issue, those two points are not ON the line

OpenStudy (anonymous):

Are you sure? I must be blind...

OpenStudy (jdoe0001):

yes, I have the pictured zoomed in

OpenStudy (anonymous):

5,6 -5,-6?

OpenStudy (jdoe0001):

those will work well, to get the slope is simple then \(\bf \begin{array}{lllll} &x_1&y_1&x_2&y_2\\ % (a,b) &({\color{red}{ 5}}\quad ,&{\color{blue}{ 6}})\quad % (c,d) &({\color{red}{ -5}}\quad ,&{\color{blue}{ -6}}) \end{array} \\\quad \\ % slope = m slope = {\color{green}{ m}}= \cfrac{rise}{run} \implies \cfrac{{\color{blue}{ y_2}}-{\color{blue}{ y_1}}}{{\color{red}{ x_2}}-{\color{red}{ x_1}}}\)

OpenStudy (anonymous):

okay give me a second and i will check answer with you

OpenStudy (anonymous):

It's 0, 0?!?

OpenStudy (jdoe0001):

well, 0,0 is ON the line, yes is not the slope though

OpenStudy (anonymous):

When I did the formula I got 0, 0. I'm sorry I am really horrible at math...

OpenStudy (haleyelizabeth2017):

Can you show us how you got that?

OpenStudy (jdoe0001):

0,0? the slope is a value alone, not an ordered pair though

OpenStudy (anonymous):

-10, -12?

OpenStudy (anonymous):

Oh wait I didn't read what you just put.

OpenStudy (anonymous):

0.83 is the slope?

OpenStudy (jdoe0001):

well \(\bf \begin{array}{lllll} &x_1&y_1&x_2&y_2\\ % (a,b) &({\color{red}{ 5}}\quad ,&{\color{blue}{ 6}})\quad % (c,d) &({\color{red}{ -5}}\quad ,&{\color{blue}{ -6}}) \end{array} \\\quad \\ % slope = m slope = {\color{green}{ m}}= \cfrac{rise}{run} \implies \cfrac{{\color{blue}{ -6}}-{\color{blue}{ 6}}}{{\color{red}{ -5}}-{\color{red}{ 5}}}\implies \cfrac{\cancel{-12}}{\cancel{-10}}\implies \cfrac{6}{5}\)

OpenStudy (anonymous):

6/5 is the answer?

OpenStudy (jdoe0001):

yeap

OpenStudy (anonymous):

:D thank you!

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