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Mathematics 25 Online
OpenStudy (gokuporter):

http://prntscr.com/8vcsl3

OpenStudy (amistre64):

when x=0, what is y?

OpenStudy (gokuporter):

2

OpenStudy (amistre64):

then our y intercept ... is at 2

OpenStudy (amistre64):

is our slope + or -?

OpenStudy (gokuporter):

Positive

OpenStudy (amistre64):

then we want a line, with postivie slope, going thru y=2

OpenStudy (gokuporter):

Yes :)

OpenStudy (amistre64):

line C fails in that it is not going thru y=2

OpenStudy (gokuporter):

b?

OpenStudy (amistre64):

when y=0, what is x?

OpenStudy (gokuporter):

5

OpenStudy (amistre64):

no

OpenStudy (amistre64):

-2x = 10

OpenStudy (amistre64):

we want a line going thru x=-5, and y=2

OpenStudy (gokuporter):

Which is a

OpenStudy (amistre64):

then lets go with A :)

OpenStudy (gokuporter):

OK :)

OpenStudy (mathstudent55):

You can solve for y and read the slope and y-intercept directly. \(-2x + 5y = 10\) \(5y = 2x + 10\) \(y = \color{red}{\dfrac{2}{5}}x + \color{green}{2}\) Compare with \(y = \color{red}{m}x + \color{green}{b}\) where \(\color{red}{m} \) is the slope, and \(\color{green}{b}\) is the y-intercept. That means we have a positive slope and a y-intercept of 2. |dw:1445821083824:dw|

OpenStudy (gokuporter):

Thanks for the explanation :)

OpenStudy (gokuporter):

??

OpenStudy (mathstudent55):

|dw:1445821328424:dw|

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