document.write( "Question 50494: Find the equation of the line through (1,-5) and (7,1) write the equation in slope intercept form.
\n" ); document.write( "1-(-5)/7-1= 6/6 or 1 as the slope, then
\n" ); document.write( "y=x+b
\n" ); document.write( "y-(-5)=x+1
\n" ); document.write( "y+5=x+1
\n" ); document.write( "y=x-4
\n" ); document.write( "is this correct? \n" ); document.write( "

Algebra.Com's Answer #33575 by AnlytcPhil(1810) $\"\"$ $\"About$

You can put this solution on YOUR website!

Find the equation of the line through (1,-5) and (7,1)\r\n" );
document.write( "write the equation in slope intercept form.\r\n" );
document.write( "1-(-5)/7-1= 6/6 or 1 as the slope, then\r\n" );
document.write( "y=x+b\r\n" );
document.write( "y-(-5)=x+1\r\n" );
document.write( "y+5=x+1\r\n" );
document.write( "y=x-4\r\n" );
document.write( "is this correct?\r\n" );
document.write( "\r\n" );
document.write( "You got the slope correct m = 1\r\n" );
document.write( "\r\n" );
document.write( "But when you substituted in \r\n" );
document.write( "\r\n" );
document.write( "  y - y1 = m(x - x1)\r\n" );
document.write( "y - (-5) = 1(x - 1)\r\n" );
document.write( "y - (-5) = x - 1     <------ you have x + 1 on the right.\r\n" );
document.write( "\r\n" );
document.write( " That's your error.\r\n" );
document.write( "\r\n" );
document.write( "   y + 5 = x - 1\r\n" );
document.write( "       y = x - 6\r\n" );
document.write( "\r\n" );
document.write( "Edwin

\n" ); document.write( " \n" ); document.write( "

\n" );