document.write( "Question 238263: Hi, I'm stuck on a math problem and I was wondering if you could help me. I need to find the equation of the line given a point and slope, which would be (-3,8), m=4/9. I've tried blancing method, but I think I'm doing it wrong. \n" ); document.write( "
Algebra.Com's Answer #175087 by alicealc(293)![]() ![]() ![]() You can put this solution on YOUR website! to find the line equation if it's given a point and a slope, this formula can be used: \n" ); document.write( "y - y1 = m * (x - x1) \n" ); document.write( "which (x1,y1) is for the point\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "so, if the line is passing through (-3,8) and has the slope m = 4/9, the equation will be: \n" ); document.write( "y - 8 = 4/9 * (x - (-3)) \n" ); document.write( "y - 8 = 4/9 * (x + 3) \n" ); document.write( "y - 8 = 4/9 * x + 4/9 * 3 \n" ); document.write( "y - 8 = 4/9 * x + 12/9 \n" ); document.write( "then, multiply all by 9: \n" ); document.write( "9y - 72 = 4x + 12 \n" ); document.write( "9y - 4x - 72 - 12 = 0 \n" ); document.write( "9y - 4x - 84 = 0\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |