document.write( "Question 122640: What's the slope and y-intercept of x = -7? \n" ); document.write( "

Algebra.Com's Answer #90056 by solver91311(24713) $\"\"$ $\"About$

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document.write( "The set of points that forms the line  is every point that has an
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document.write( "x-coordinate of -7 paired with every possible real number value for y.  The
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document.write( "slope of a line is given by .  But in the equation
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document.write( " the x-coordinate for any point on the line is -7.  That means that
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document.write( "the denominator of the slope calculation is 0, therefore the slope is
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document.write( "undefined.  Since x = -7 no matter what y is, this line never crosses the
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document.write( "y-axis.  There is no y-intercept because the line is vertical and therefore
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document.write( "parallel to the y-axis.  
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