document.write( "Question 647530: Find the equation of the line containing the point (3,5) and parallel to the line x+3y=9 \n" ); document.write( "
Algebra.Com's Answer #406276 by swincher4391(1107)![]() ![]() You can put this solution on YOUR website! In order to do point-slope form, we need a point and a slope. (Nice name right?)\r \n" ); document.write( "\n" ); document.write( "We have a point, let's get ourselves a slope.\r \n" ); document.write( "\n" ); document.write( "We are given a vital piece of information. Our line must be parallel to this one: x+3y=9. This means they must have the same slope. \r \n" ); document.write( "\n" ); document.write( "If you're clever, you may know that of the form Ax+By=C, the slope is -A/B or -1/3. Otherwise, just solve for y=mx+b form and m is your slope. \r \n" ); document.write( "\n" ); document.write( "3y = 9-x \n" ); document.write( "y = 9/3 - x/3 \n" ); document.write( "y = 3 - (1/3)x\r \n" ); document.write( "\n" ); document.write( "And as we predicted, our slope is -1/3.\r \n" ); document.write( "\n" ); document.write( "Now we have a point and a slope. \n" ); document.write( "m=-1/3 \n" ); document.write( "(x1,y1) = (3,5)\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Hope this helps!\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |