document.write( "Question 935290: write the equation of the line that contains the
\n" ); document.write( "indicated point(s), and/or has the given slope or intercepts; use
\n" ); document.write( "either the slope–intercept form y = mx + b, or the form x = c.\r
\n" ); document.write( "\n" ); document.write( "(4, 6); (4, -3) \n" ); document.write( "
Algebra.Com's Answer #568489 by TimothyLamb(4379)\"\" \"About 
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slope = m = dy/dx
\n" ); document.write( "m = (6+3)/(4-4)
\n" ); document.write( "m = (9)/(0)
\n" ); document.write( "division by zero is undefined:
\n" ); document.write( "slope is undefined:
\n" ); document.write( "vertical line:
\n" ); document.write( "x = 4
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