(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find the equations of two lines through A. one parallel and the other perpendicular to the line defined by the given equation.

[tex]A(-1,1),y=1[/tex]

2. Relevant equations

Parallel lines

[tex]y = mx + b[/tex]

then solve for b

Perpendicular

[tex]y = -mx + b[tex]

then solve for b

3. The attempt at a solution

Parallel:

[tex]y=1[/tex]

[tex]y = 0 + b[/tex]

[tex]1 = 0 + b[/tex]

[tex]b = 1[tex]

thus,

[tex]y=1[/tex]

Perpendicular:

I got stuck at the perpendicular part.... because the answer from the back of my book is x = -1

My answer is y = 1 also

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# Homework Help: The equation of a straight line problems

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