document.write( "Question 83878: What is the slope and y intercept of the line?
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document.write( "-2y = 3x - 15
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Algebra.Com's Answer #60355 by bucky(2189)![]() ![]() ![]() You can put this solution on YOUR website! Given: \n" ); document.write( ". \n" ); document.write( "-2y = 3x - 15 \n" ); document.write( ". \n" ); document.write( "You can easily find the slope and the y-axis intercept if you can get the given equation \n" ); document.write( "in the form: \n" ); document.write( ". \n" ); document.write( "y = mx + b \n" ); document.write( ". \n" ); document.write( "In this form the slope is \"m\" and the y-axis intercept is \"b\" \n" ); document.write( ". \n" ); document.write( "To get the given equation into slope intercept form, you need to solve for +y. In this case \n" ); document.write( "the left side will become +y if you divide all terms on both sides of the given equation \n" ); document.write( "by -2. The process is as follows: \n" ); document.write( ". \n" ); document.write( "-2y = 3x - 15 <--- given equation \n" ); document.write( ". \n" ); document.write( "(-2y/-2) = (3x/-2) - (15/-2) <--- shows division of all terms by -2 \n" ); document.write( ". \n" ); document.write( "y = -(3/2)x - (-15/2) <--- notice that - (-15/2) = + 15/2 \n" ); document.write( ". \n" ); document.write( "y = -(3/2)x + (15/2) <--- given equation in slope intercept form \n" ); document.write( ". \n" ); document.write( "By comparing this equation with the slope intercept form, you can see that \"m\" (the \n" ); document.write( "multiplier of the \"x\") is -3/2 and \"b\" the y-axis intercept is +15/2. That's the answer \n" ); document.write( "to the problem. As an aid to seeing that this is correct, here's a graph of the original \n" ); document.write( "equation in the problem: \n" ); document.write( ". \n" ); document.write( " \n" ); document.write( ". \n" ); document.write( "Notice that the slope is negative and the value of y where the graph crosses the y-axis is \n" ); document.write( "about +7.5 or +15/2. \n" ); document.write( ". \n" ); document.write( "Hope this helps you to understand the problem a little more. \n" ); document.write( " \n" ); document.write( " |