document.write( "Question 690789: how do you Write the equation of the line that has an undefined slope and passes through the point (4, 7). \n" ); document.write( "

Algebra.Com's Answer #426397 by KMST(5328) $\"\"$ $\"About$

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The slope of a line (if it exists) is the increase in y as x increases by 1.
\n" ); document.write( "If the slope is undefined, x can never increase, because the line is vertical, meaning that all the points have the same x coordinate.
\n" ); document.write( "If (4,7) is one of those points, then the equation of the line is $\"x=4\"$ .
\n" ); document.write( "If you prefer, you could write it as $\"x-4=0\"$ \n" ); document.write( "

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