document.write( "Question 955849: I can not find r my answer seems wrong
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Algebra.Com's Answer #583943 by MathTherapy(10552)\"\" \"About 
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\n" ); document.write( "I can not find r my answer seems wrong
\n" ); document.write( "(2,8)(r-4) m=-3 please show me step by step
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With a slope, or m of - 3, and points, (2, 8) and (r, -4), we use the slope formula: \"m+=+%28y%5B1%5D+-+y%5B2%5D%29%2F%28x%5B1%5D+-+x%5B2%5D%29\" to get:
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document.write( "\"-+3+=+%288+-+-+4%29%2F%282+-+r%29\"
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document.write( "\"-+3+=+%288+%2B+4%29%2F%282+-+r%29\"
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document.write( "\"-+3+=+12%2F%282+-+r%29\"
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document.write( "\"-+3%282+-+r%29+=+12\" ------ Cross-multiplying
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document.write( "- 6 + 3r = 12
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document.write( "3r = 12 + 6
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document.write( "3r = 18
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document.write( "\"r+=+18%2F3\", or \"highlight_green%28r+=+6%29\" \n" );
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