document.write( "Question 655221: How do I determine f(-20) from a graph? \n" ); document.write( "
Algebra.Com's Answer #408978 by MathLover1(20855) You can put this solution on YOUR website! \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "construct a vertical line at |