document.write( "Question 59875: if a line is vertical what is the slope? \n" ); document.write( "
Algebra.Com's Answer #41088 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
The slope is \"highlight%28undefined%29\" for vertical lines, because they are going forever up and forever down at the same time.
\n" ); document.write( "Happy Calculating!!!
\n" ); document.write( "
\n" );