document.write( "Question 442168: Find the equation of the line (in slope-in form) that is perpendicular to 2x-y=4 and passes through the vertex of the parabola y=x^2-6x+7
\n" ); document.write( "I know slope int for is 2x-4=y but having problems with the rest
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Algebra.Com's Answer #304980 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Use the general form
\n" ); document.write( "\"+y+=+m%2Ax+%2B+b+\" where \"+m+\" = slope
\n" ); document.write( "given:
\n" ); document.write( "\"y+=+2x+-+4+\"
\n" ); document.write( "The slope of a line perpendicular to this line
\n" ); document.write( "has slope = \"+-1%2F2+\"
\n" ); document.write( "So far,
\n" ); document.write( "\"+y+=+%28-1%2F2%29%2Ax+%2B+b+\"
\n" ); document.write( "The vertex of \"+y+=+x%5E2+-+6x+%2B+7+\"
\n" ); document.write( "is at ( -b/(2a) , y ) where
\n" ); document.write( "\"+a+=+1+\"
\n" ); document.write( "\"+b+=+-6+\"
\n" ); document.write( "\"++-%28-6%29+%2F+%282%2A1%29+=+3+\"
\n" ); document.write( "To find the y coordinate
\n" ); document.write( "\"+y+=+x%5E2+-+6x+%2B+7+\"
\n" ); document.write( "\"+y+=+3%5E2+-+6%2A3+%2B+7+\"
\n" ); document.write( "\"+y+=+9+-+18+%2B+7+\"
\n" ); document.write( "\"+y+=+-2+\"
\n" ); document.write( "Go back to:
\n" ); document.write( "\"+y+=+%28-1%2F2%29%2Ax+%2B+b+\"
\n" ); document.write( "\"+-2+=+%28-1%2F2%29%2A3+%2B+b+\"
\n" ); document.write( "\"+-2+=+-3%2F2+%2B+b+\"
\n" ); document.write( "\"+2b+=+-4+%2B+3+\"
\n" ); document.write( "\"+b+=+-1%2F2+\"
\n" ); document.write( "------------
\n" ); document.write( "\"+y+=+%28-1%2F2%29%2Ax+-+1%2F2+\" answer
\n" ); document.write( "Here's the plot:
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