document.write( "Question 518168: Can you explain why the line y=4 is a vertical line? \n" ); document.write( "
Algebra.Com's Answer #345062 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
\"+y+=+4+\" is not a vertical line.
\n" ); document.write( "It's a horizontal line.
\n" ); document.write( "That is, so long as you call the vertical
\n" ); document.write( "the y-axis, the way it usually is.
\n" ); document.write( "------------
\n" ); document.write( "The reason \"+y=4+\" is horizontal is
\n" ); document.write( "because (1) It wants to be \"4\" all
\n" ); document.write( "the time, no matter what, and (2)
\n" ); document.write( "It doesn't care what \"x\" is, so
\n" ); document.write( "whether \"+x+=+5+\" or \"+x+=+5000+\"
\n" ); document.write( "doesn't matter.
\n" ); document.write( "The only line that satisfies these conditions
\n" ); document.write( "is a horizontal line where every point
\n" ); document.write( "looks like (x,4)
\n" ); document.write( "Hope this helps
\n" ); document.write( "
\n" );