I DON'T UNDERSTAND WHY MY ANSWER IS NOT CORRECT :( SLOPE IS -9/11 AND THE
EQUATION IS -9X/11+44
Find the equation of the line parallel to -9x-11y=-2 and passing through the point (5,-1).
The equation of the line is ??

- anonymous

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- Mertsj

The slope of -9x-11y=-2 is -9/11
So plug that slope and the given point into point-slope form:
\[y-y _{1}=m(x-x _{1})\]

- anonymous

i did..

- whpalmer4

@mathcalculus you did your algebra incorrectly, it appears...

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## More answers

- anonymous

can you point it out where?

- Mertsj

\[y-(-1)=\frac{-9}{11}(x-5)\]

- Mertsj

Simplify and you will be done.

- anonymous

i have this: y=9x/11 +44

- whpalmer4

your y-intercept value will be a fraction...maybe you didn't multiply the -9/11 when expanding

- anonymous

@whpalmer4 i'm not sure where I have made my mistake.

- whpalmer4

\[1+y = \frac{1}{11}(45-9x)\]probably screwed up bringing the 1 across

- Mertsj

\[y+1=\frac{-9}{11}x+\frac{45}{11}\]

- anonymous

isn't y- (-1) a y+1?

- anonymous

so if i bring it to the other side it must be subtracted from the 45

- anonymous

oh yes! got it

- anonymous

damn

- anonymous

9/11 * 5

- Mertsj

\[y=\frac{-9}{11}x+\frac{45}{11}-1=\frac{-9}{11}x+\frac{34}{11}\]

- whpalmer4

subtract 11/11 from each side:
\[y+1 - 11/11 = \frac{1}{11}{45-11-9x}\]\[y = \frac{1}{11}(34-9x)\]\[y = -\frac{9x}{11}+\frac{34}{11}\]

- whpalmer4

whoops, used invisible () in that first eq. :-)

- anonymous

that's not the answer..... :(

- anonymous

it keeps saying it's wrong.

- anonymous

i think it's the website, it must be correct. thank you everyone.

- whpalmer4

well, that in fact is the equation of a line parallel to the original line, passing through -5,1 as you can see in this graph:

##### 1 Attachment

- Mertsj

Check the rules for entry. Maybe you are entering the fractions incorrectly or maybe you are not supposed to write y = or maybe they want the equation in some other form besides slope-intercept form.

- whpalmer4

(5,-1) that is

- anonymous

yes, I checked. appreciate the help

- anonymous

yup

- anonymous

it must be correct, even the calculator shows it.

- Mertsj

Maybe you want to try 9x+11y=34

- whpalmer4

I'll sometimes multiply by the denominator of the fraction, do the problem without the pesky fractions and accompanying mistakes, then divide again by the former denominator for the final answer.

- whpalmer4

I'd say you know what you're doing, in any case...watch for those fraction mistakes :-)

- anonymous

thanks alot ! :)

- Mertsj

yw

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