document.write( "Question 154564: How would I write these in standard form?
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Algebra.Com's Answer #113804 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
# 1\r
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\n" ); document.write( "\n" ); document.write( "Since the equation has a y-intercept of 4, this means that the line goes through the point (0,4)\r
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\n" ); document.write( "\n" ); document.write( "If you want to find the equation of line with a given a slope of \"3\" which goes through the point (\"0\",\"4\"), you can simply use the point-slope formula to find the equation:\r
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\n" ); document.write( "\n" ); document.write( "---Point-Slope Formula---\r
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\n" ); document.write( "\n" ); document.write( "\"y-y%5B1%5D=m%28x-x%5B1%5D%29\" where \"m\" is the slope, and is the given point\r
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\n" ); document.write( "\n" ); document.write( "So lets use the Point-Slope Formula to find the equation of the line\r
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\n" ); document.write( "\n" ); document.write( "\"y-4=%283%29%28x-0%29\" Plug in \"m=3\", \"x%5B1%5D=0\", and \"y%5B1%5D=4\" (these values are given)\r
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\n" ); document.write( "\n" ); document.write( "\"y-4=3x%2B%283%29%28-0%29\" Distribute \"3\"\r
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\n" ); document.write( "\n" ); document.write( "\"y-4=3x%2B0\" Multiply \"3\" and \"-0\" to get \"0\"\r
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\n" ); document.write( "\n" ); document.write( "\"y=3x%2B0%2B4\" Add 4 to both sides to isolate y\r
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\n" ); document.write( "\n" ); document.write( "\"y=3x%2B4\" Add \"0\" and \"4\" to get \"4\" \r
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\n" ); document.write( "\n" ); document.write( "Answer:\r
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\n" ); document.write( "\n" ); document.write( "So the equation of the line with a slope of \"3\" which goes through the point (\"0\",\"4\") is:\r
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\n" ); document.write( "\n" ); document.write( "\"y=3x%2B4\" which is now in \"y=mx%2Bb\" form where the slope is \"m=3\" and the y-intercept is \"b=4\"\r
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\n" ); document.write( "\n" ); document.write( "Notice if we graph the equation \"y=3x%2B4\" and plot the point (\"0\",\"4\"), we get (note: if you need help with graphing, check out this solver)\r
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\n" ); document.write( "\n" ); document.write( " Graph of \"y=3x%2B4\" through the point (\"0\",\"4\")\r
\n" ); document.write( "\n" ); document.write( "and we can see that the point lies on the line. Since we know the equation has a slope of \"3\" and goes through the point (\"0\",\"4\"), this verifies our answer.\r
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\n" ); document.write( "\n" ); document.write( "# 2\r
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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( "\"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=%28-6--6%29%2F%284-2%29\" Plug in \"y%5B2%5D=-6\", \"y%5B1%5D=-6\", \"x%5B2%5D=4\", and \"x%5B1%5D=2\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=%280%29%2F%284-2%29\" Subtract \"-6\" from \"-6\" to get \"0\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=%280%29%2F%282%29\" Subtract \"2\" from \"4\" to get \"2\"\r
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\n" ); document.write( "\n" ); document.write( "\"m=0\" 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=0\"\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--6=0%28x-2%29\" Plug in \"m=0\", \"x%5B1%5D=2\", and \"y%5B1%5D=-6\"\r
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\n" ); document.write( "\n" ); document.write( "\"y%2B6=0%28x-2%29\" Rewrite \"y--6\" as \"y%2B6\"\r
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\n" ); document.write( "\n" ); document.write( "\"y%2B6=0x%2B0%28-2%29\" Distribute\r
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\n" ); document.write( "\n" ); document.write( "\"y%2B6=0x%2B0\" Multiply\r
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\n" ); document.write( "\n" ); document.write( "\"y=0x%2B0-6\" Subtract 6 from both sides. \r
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\n" ); document.write( "\n" ); document.write( "\"y=0x-6\" Combine like terms. \r
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\n" ); document.write( "\n" ); document.write( "\"y=-6\" Simplify\r
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\n" ); document.write( "\n" ); document.write( "So the equation that goes through the points and is \"y=-6\"\r
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\n" ); document.write( "\n" ); document.write( " Notice how the graph of \"y=-6\" goes through the points and . So this visually verifies our answer.\r
\n" ); document.write( "\n" ); document.write( " Graph of \"y=-6\" through the points and \r
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