Help!!! Just this 1 problem

find the equations of two lines through A, one parallel and the other perpendicular to the line defined by the given equation:

30.)

thats all for today

thank you very much for all your helps!

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- December 1st 2006, 09:22 AM^_^Engineer_Adam^_^help on analytic geometry
Help!!! Just this 1 problem

find the equations of two lines through A, one parallel and the other perpendicular to the line defined by the given equation:

30.)

thats all for today

thank you very much for all your helps! - December 1st 2006, 10:42 AMCaptainBlack
Rewrite in standard form: so the slope of lines parallel to this all have slope , and the slope of a line perpendicular to this has slope .

Now the equation of the parallel line is:

now it goes through , so

so , so:

.

A similar procedure gives the line at right angle to this one as:

RonL