document.write( "Question 1112201: Find the slope if it exists of the line containing the points (9,-3) and (9,-9) \n" ); document.write( "
Algebra.Com's Answer #727215 by josmiceli(19441)\"\" \"About 
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slope = [ change in y ] / [ change in x ]
\n" ); document.write( "( 9,-3 )
\n" ); document.write( "( 9, -9 )
\n" ); document.write( "\"+m+=+%28+-3+-%28-9%29+%29+%2F+%28+9+-+9+%29+\"
\n" ); document.write( "\"+m+=+6%2F0+\"
\n" ); document.write( "The zero in the denominator says that the
\n" ); document.write( "slope is infinite.
\n" ); document.write( "Infinite slope means the line is vertical.
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