document.write( "Question 784342: Find the equation of line going through (3,4) and (1,-1).\r
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document.write( "This is what I've done so far:\r
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document.write( "m= -1-4/1-3= -5/2
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document.write( "y-4= -5/2(x-3)
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document.write( "-2(y-4)=-5(x-3)
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document.write( "-2y+8=-5x+15
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document.write( " -8 -8
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document.write( "-2y/-2y=-5x/-2+7/-2
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document.write( "y=-5/2x+7/-2 \n" );
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Algebra.Com's Answer #477062 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! Find the equation of line going through (3,4) and (1,-1).\r \n" ); document.write( "\n" ); document.write( "This is what I've done so far:\r \n" ); document.write( "\n" ); document.write( "m= -1-4/1-3= -5/2 ************** = -5/-2 = 5/2 \n" ); document.write( "Use y = mx + b and either point to find b \n" ); document.write( "4 = (5/2)*3 + b \n" ); document.write( "b = -7/2 \n" ); document.write( "--> y = (5/2)x - 7/2 \n" ); document.write( "======================== \n" ); document.write( "This would work, but the slope is not right. \n" ); document.write( "y-4= -5/2(x-3) \n" ); document.write( "-2(y-4)=-5(x-3) \n" ); document.write( "-2y+8=-5x+15 \n" ); document.write( " -8 -8 \n" ); document.write( "-2y/-2y=-5x/-2+7/-2 \n" ); document.write( "y=-5/2x+7/-2 ************* -5/2x could be (-5/2)x or -5/(2x). Add parentheses. \n" ); document.write( " |