document.write( "Question 628457: write the slope-intercept equation for the line that passes through (-5, 10) and (-4, 3). Please show all of your work. \n" ); document.write( "
Algebra.Com's Answer #395631 by jim_thompson5910(35256)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "First let's find the slope of the line through the points and \r
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\n" ); document.write( "\n" ); document.write( "Note: is the first point . So this means that \"x%5B1%5D=-5\" and \"y%5B1%5D=10\".\r
\n" ); document.write( "\n" ); document.write( "Also, is the second point . So this means that \"x%5B2%5D=-4\" and \"y%5B2%5D=3\".\r
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\n" ); document.write( "\n" ); document.write( "\"m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29\" Start with the slope formula.\r
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\n" ); document.write( "\n" ); document.write( "\"m=%283-10%29%2F%28-4--5%29\" Plug in \"y%5B2%5D=3\", \"y%5B1%5D=10\", \"x%5B2%5D=-4\", and \"x%5B1%5D=-5\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=%28-7%29%2F%28-4--5%29\" Subtract \"10\" from \"3\" to get \"-7\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=%28-7%29%2F%281%29\" Subtract \"-5\" from \"-4\" to get \"1\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=-7\" Reduce\r
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\n" ); document.write( "\n" ); document.write( "So the slope of the line that goes through the points and is \"m=-7\"\r
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\n" ); document.write( "\n" ); document.write( "Now let's use the point slope formula:\r
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\n" ); document.write( "\n" ); document.write( "\"y-y%5B1%5D=m%28x-x%5B1%5D%29\" Start with the point slope formula\r
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\n" ); document.write( "\n" ); document.write( "\"y-10=-7%28x--5%29\" Plug in \"m=-7\", \"x%5B1%5D=-5\", and \"y%5B1%5D=10\"\r
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\n" ); document.write( "\n" ); document.write( "\"y-10=-7%28x%2B5%29\" Rewrite \"x--5\" as \"x%2B5\"\r
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\n" ); document.write( "\n" ); document.write( "\"y-10=-7x%2B-7%285%29\" Distribute\r
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\n" ); document.write( "\n" ); document.write( "\"y-10=-7x-35\" Multiply\r
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\n" ); document.write( "\n" ); document.write( "\"y=-7x-35%2B10\" Add 10 to both sides. \r
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\n" ); document.write( "\n" ); document.write( "\"y=-7x-25\" Combine like terms. \r
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\n" ); document.write( "\n" ); document.write( "So the equation that goes through the points and is \"y=-7x-25\"\r
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\n" ); document.write( "If you need more help, email me at jim_thompson5910@hotmail.com\r
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