document.write( "Question 72243: Graph 2x+2y=4 by plotting points. The rule of thumb suggests plotting 3 points and then draw a line so plot at least 3 points . Draw an accurate and straight line through plotted points \n" ); document.write( "

Algebra.Com's Answer #51635 by rmromero(383) $\"\"$ $\"About$

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document.write( "Graph 2x+2y=4 by plotting points.\r
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document.write( "To graph this equation we have to assume values of x.
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document.write( "Substitute the values of x to the equation to find y.
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document.write( "Then plot the points.
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document.write( "Draw a line.\r
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document.write( "Assume values of x.
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document.write( "      x          y
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document.write( "      -2         4
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document.write( "      0          2
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document.write( "      2          0\r
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document.write( "2x+2y=4, x = -2
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document.write( " 2(-2) + 2y = 4    simplify
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document.write( "  -4 + 2y = 4
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document.write( "       2y = 4 + 4 add both sides by 4
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document.write( "       2y = 8     divide both sides by 2
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document.write( "        y = 4  \r
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document.write( "2x+2y=4 , x = 0
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document.write( " 2(0) + 2y = 4
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document.write( "        2y = 4   divide both sides by 2
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document.write( "         y = 2 \r
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document.write( "2x+2y=4, x = 2
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document.write( " 2(2) + 2y = 4
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document.write( "  4  + 2y = 4
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document.write( "       2y = 4 - 4
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document.write( "       2y = 0
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document.write( "        y = 0  \r
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document.write( "Plot the points (-2, 4), (0, 2), (2, 0)\r
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