document.write( "Question 1073389: What is the slope of a line that is perpendicular to y= -3? \n" ); document.write( "
Algebra.Com's Answer #688211 by josgarithmetic(39620)\"\" \"About 
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\"y=-3\", is a horizontal line, -3 for all values of x.
\n" ); document.write( "No vertical change.
\n" ); document.write( "Slope is 0.\r
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\n" ); document.write( "\n" ); document.write( "Any vertical line in the plane will be perpendicular to y=-3,
\n" ); document.write( "and such a line HAS NO SLOPE.
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