document.write( "Question 273662: what is the verticle line through (9,6)
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Algebra.Com's Answer #199881 by richwmiller(17219)\"\" \"About 
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Vertical not verticle
\n" ); document.write( "Which would be vertical? Which would be horizontal?
\n" ); document.write( " x=9 or y=6?\r
\n" ); document.write( "\n" ); document.write( "If y is always 6 then x can be anything! So that is a horizontal line since the height (y) never changes the slope is zero.
\n" ); document.write( "so we want x=9 since the run never changes. the slope is undefined for x=9
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