document.write( "Question 66354: No book available as this is a home quiz. Have looked for help on the web to help my son but cannot find anything to help teach this concept. Haven't done alegebra in 30 years :) 4x+3y=12 \n" ); document.write( "
Algebra.Com's Answer #47056 by ptaylor(2198) You can put this solution on YOUR website! No book available as this is a home quiz. Have looked for help on the web to help my son but cannot find anything to help teach this concept. Haven't done alegebra in 30 years :) 4x+3y=12 \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "It's not exactly clear to me what the concept is that you are trying teach your son.\r \n" ); document.write( "\n" ); document.write( "The equation that you give is the equation of a straight line. Now the standard form for this is the slope-intercept form:\r \n" ); document.write( "\n" ); document.write( "y=mx+b where m is the slope of the line and b is the y-intercept.\r \n" ); document.write( "\n" ); document.write( "We can put the equation into slope-intercept form as follows:\r \n" ); document.write( "\n" ); document.write( "4x+3y=12 subtract 4x from both sides\r \n" ); document.write( "\n" ); document.write( "4x-4x+3y=12-4x or \n" ); document.write( "3y=-4x+12 divide through by 3\r \n" ); document.write( "\n" ); document.write( "y=-(4/3)x+4\r \n" ); document.write( "\n" ); document.write( "slope is -4/3 and the y intercept is 4\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If this is not what you are looking for, I suggest that you re-post.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Hope this helps------ptaylor \n" ); document.write( " |