document.write( "Question 73716: Graph each of the following inequalities. \r
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document.write( "3x-4y<12 \n" );
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Algebra.Com's Answer #53011 by bucky(2189) ![]() You can put this solution on YOUR website! First graph the equation: \n" ); document.write( ". \n" ); document.write( "3x - 4y = 12 \n" ); document.write( ". \n" ); document.write( "You can do this easily by first setting x equal to 0. This reduces the equation to: \n" ); document.write( ". \n" ); document.write( "-4y = 12 \n" ); document.write( ". \n" ); document.write( "Dividing both sides of this by -4 results in y = -3. So you know that the point x = 0 and y = -3 \n" ); document.write( "or (0, -3) is one point on the graph. \n" ); document.write( ". \n" ); document.write( "Next set y equal to 0. This reduces the equation to: \n" ); document.write( ". \n" ); document.write( "3x = 12 \n" ); document.write( ". \n" ); document.write( "Dividing both sides of this by 3 results in: \n" ); document.write( ". \n" ); document.write( "x = 4. Therefore, when y is 0 then x is +4 so the point (4, 0) is on the graph. \n" ); document.write( ". \n" ); document.write( "If you draw the graph of this equation you get the following: \n" ); document.write( ". \n" ); document.write( " \n" ); document.write( ". \n" ); document.write( "The equation tells you that the left side (3x - 4y) equals 12. But the problem says that \n" ); document.write( "(3x - 4y) is less than 12. So any solution that is below the graph is less than 12. \n" ); document.write( "Shade in the entire area below (but not including) the line. This shaded region is all the \n" ); document.write( "(x,y) points that will make the left side of this equation smaller than 12. \n" ); document.write( ". \n" ); document.write( "Hope this helps you to understand this inequality problem. \n" ); document.write( " |