document.write( "Question 175465: Write and equation in slope-intercept form of the line that passes through the given points such as (12,-3),(-8,1) \n" ); document.write( "
Algebra.Com's Answer #130542 by jim_thompson5910(35256)\"\" \"About 
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\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( "\"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=%281--3%29%2F%28-8-12%29\" Plug in \"y%5B2%5D=1\", \"y%5B1%5D=-3\", \"x%5B2%5D=-8\", and \"x%5B1%5D=12\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=%284%29%2F%28-8-12%29\" Subtract \"-3\" from \"1\" to get \"4\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=%284%29%2F%28-20%29\" Subtract \"12\" from \"-8\" to get \"-20\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=-1%2F5\" 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=-1%2F5\"\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--3=%28-1%2F5%29%28x-12%29\" Plug in \"m=-1%2F5\", \"x%5B1%5D=12\", and \"y%5B1%5D=-3\"\r
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\n" ); document.write( "\n" ); document.write( "\"y%2B3=%28-1%2F5%29%28x-12%29\" Rewrite \"y--3\" as \"y%2B3\"\r
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\n" ); document.write( "\n" ); document.write( "\"y%2B3=%28-1%2F5%29x%2B%28-1%2F5%29%28-12%29\" Distribute\r
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\n" ); document.write( "\n" ); document.write( "\"y%2B3=%28-1%2F5%29x%2B12%2F5\" Multiply\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-1%2F5%29x%2B12%2F5-3\" Subtract 3 from both sides. \r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-1%2F5%29x-3%2F5\" Combine like terms. note: If you need help with fractions, check out this solver.\r
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\n" ); document.write( "\n" ); document.write( "\"y=%28-1%2F5%29x-3%2F5\" Simplify\r
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\n" ); document.write( "\n" ); document.write( "So the equation that goes through the points and is \"y=%28-1%2F5%29x-3%2F5\"\r
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\n" ); document.write( "\n" ); document.write( " Notice how the graph of \"y=%28-1%2F5%29x-3%2F5\" goes through the points and . So this visually verifies our answer.\r
\n" ); document.write( "\n" ); document.write( " Graph of \"y=%28-1%2F5%29x-3%2F5\" through the points and
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