document.write( "Question 372233: why is the line x-4 a vertical line \n" ); document.write( "

Algebra.Com's Answer #265168 by solver91311(24713) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "It isn't.

is simply a binomial expression in one variable. Now if you make it equal to something, such as zero, THEN you have an equation whose graph and/or solution set is a straight line, and in this particular case, a vertical line.\r
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\n" ); document.write( "\n" ); document.write( "The reason it is a vertical line is that the set of points that comprise the solution set of the equation all have an ordinate, or

-coordinate, of the value 4. All points with an

-coordinate of 4 must lie on a vertical line. Go ahead and try to find a point with an

-coordinate of 4 that is NOT on the vertical line

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\n" ); document.write( "\n" ); document.write( "John
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\n" ); document.write( "My calculator said it, I believe it, that settles it
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