document.write( "Question 249783: if the points (3, r) and (r, -1) lie on a line with slope -3/4, wat is the value of r? \n" ); document.write( "
Algebra.Com's Answer #181864 by nerdybill(7384)![]() ![]() You can put this solution on YOUR website! if the points (3, r) and (r, -1) lie on a line with slope -3/4, wat is the value of r? \n" ); document.write( ". \n" ); document.write( "Slope between two points on a line: \n" ); document.write( "m = (y2 - y1)/(x2 - x1) \n" ); document.write( ". \n" ); document.write( "Therefore, we have: \n" ); document.write( "-3/4 = (-1 - r)/(r - 3) \n" ); document.write( "Multiply both sides by 4(r-3): \n" ); document.write( "-3(r-3) = 4(-1 - r) \n" ); document.write( "-3r+9 = -4 - 4r \n" ); document.write( "r+9 = -4 \n" ); document.write( "r = -13\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |