document.write( "Question 317999: Why is the line x=4 a vertical line? \n" ); document.write( "
Algebra.Com's Answer #227690 by Earlsdon(6294)\"\" \"About 
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If you were to graph all the points whose coordinates are (4, y) where the y-coordinate can be any real number, then you would see that the points fall in a vertical straight line that passes through x=4. \n" ); document.write( "
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