document.write( "Question 117191: How can you tell if an two equations are perpendicular or parallel? \n" ); document.write( "
Algebra.Com's Answer #85228 by checkley71(8403)\"\" \"About 
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THE LINE EQUATION Y=mX+b HAS THE m VALUE AS IT'S SLOPE.
\n" ); document.write( "IF 2 EQUATIONS HAVE THE SAME m VALUE THEN THEY ARE PARALLEL.
\n" ); document.write( "IF THE 2 EQUATIONS HAVE SLOPE VALUES THAT ARE NEGATIVE RECIPRICAL OF EACH OTHER THEN THEY ARE PERPENDICULAR.
\n" ); document.write( "EXAMPLES OF NEGTIVE RECIPRICALS ARE: 2 & -1/2 OR 1/4 & -4 OR 13/2 & -2/13.
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