document.write( "Question 146778: Graph inequality.
\n" ); document.write( "3x+4y is less than or equal to 12.
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Algebra.Com's Answer #107190 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "\"3x%2B4y%3C=12\" Start with the given inequality.\r
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\n" ); document.write( "\n" ); document.write( "\"3x%2B4y=12\" Replace the inequality sign with an equals sign.\r
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\n" ); document.write( "\n" ); document.write( "\"4y=12-3x\" Subtract \"3x\" from both sides.\r
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\n" ); document.write( "\n" ); document.write( "\"y=%2812-3x%29%2F%284%29\" Divide both sides by \"4\" to isolate \"y\".\r
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\n" ); document.write( "\n" ); document.write( "\"y=-%283%2F4%29x%2B3\" Rearrange the terms.\r
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\n" ); document.write( "\n" ); document.write( "So in order to plot \"3x%2B4y%3C=12\" or \"y%3C=-%283%2F4%29x%2B3\" (which is the same thing), we need to plot the equation \"y=-%283%2F4%29x%2B3\" first.
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\n" ); document.write( "\n" ); document.write( "\"+graph%28+500%2C+500%2C+-10%2C+10%2C+-10%2C+10%2C-%283%2F4%29x%2B3%29+\" Graph of \"y=-%283%2F4%29x%2B3\"\r
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\n" ); document.write( "\n" ); document.write( "Now plug in a test point (0,0) into the inequality \"y%3C=-%283%2F4%29x%2B3\"\r
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\n" ); document.write( "\n" ); document.write( "\"y%3C=-%283%2F4%29x%2B3\" Start with the given inequality.\r
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\n" ); document.write( "\n" ); document.write( "\"0%3C=-%283%2F4%29%2A%280%29%2B3\" Plug in \"x=0\" and \"y=0\"\r
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\n" ); document.write( "\n" ); document.write( "\"0%3C=3\" Evaluate and simplify.\r
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\n" ); document.write( "\n" ); document.write( "Since the inequality is true, this means that we shade the entire region that contains the point (0,0)\r
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\n" ); document.write( "\n" ); document.write( "In other words, we simply shade the entire region that is below the line.\r
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\n" ); document.write( "\n" ); document.write( " Graph of \"y%3C=-%283%2F4%29x%2B3\" with the shaded region in green\r
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