document.write( "Question 83081: What is the equation of the line through (0,9) that is parallel to the line 3x+5y=15? \n" ); document.write( "
Algebra.Com's Answer #59636 by rapaljer(4671)![]() ![]() You can put this solution on YOUR website! In order to find the equation of a line, you must know two things: \n" ); document.write( " 1) Slope \n" ); document.write( " 2) Y-intercept\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "In this problem, the slope must be found by writing the given equation in \"slope-intercept\" form. That is, you must solve for y in terms of x.\r \n" ); document.write( "\n" ); document.write( "3x+5y=15 \n" ); document.write( "5y = -3x + 15\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Divide both sides by 5: \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The slope of the given line is m=-3/5, so the slope of any line PARALLEL to this line is also m=-3/5.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Secondly, the given point (0,9) just happens to be the Y-intercept, so in the equation \n" ); document.write( "y=mx+b \n" ); document.write( "m=-3/5 and b=9\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "R^2 at SCC \n" ); document.write( " |