document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=897423>Question 897423</A>: <I><SPAN STYLE=\"word-break: break-all;\"> So this has really confused me. Can someone help me solve it and offer an explanation? I would be forever grateful!<BR>\n" );
document.write( "Use the table below to find the indicated function values.<BR>\n" );
document.write( "x	f(x)<BR>\n" );
document.write( "-4	-3<BR>\n" );
document.write( "-2	2<BR>\n" );
document.write( "0	7<BR>\n" );
document.write( "2	12<BR>\n" );
document.write( "4	17\r<BR>\n" );
document.write( "\n" );
document.write( "a.	f(-4)<BR>\n" );
document.write( "b.	f(2)<BR>\n" );
document.write( "c. For what value of x is f(x)=7\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #544135 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=544135\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> standard form for linear equation is f(x) = ax +b<BR>\n" );
document.write( "now the function value (0, 7) gives us the value of b, that is,<BR>\n" );
document.write( "f(x) = 7 = a(0) +b and b = 7<BR>\n" );
document.write( "so far we have<BR>\n" );
document.write( "f(x) = ax +7<BR>\n" );
document.write( "let's pick another value, say (-4, -3), then we have<BR>\n" );
document.write( "f(x) = -3 = a(-4) +7<BR>\n" );
document.write( "-10 = -4a and<BR>\n" );
document.write( "a = 10/4 = 5/2 and our equation is<BR>\n" );
document.write( "f(x) = (5x/2) + 7<BR>\n" );
document.write( "a) f(-4) = (5*-4/2) + 7<BR>\n" );
document.write( "f(-4) = -10 +7 = -3<BR>\n" );
document.write( "b) f(2) = (5*2/2) +7<BR>\n" );
document.write( "f(2) = 5 + 7 = 12<BR>\n" );
document.write( "c) f(x) = 7 = (5*0/2) +7 = 7<BR>\n" );
document.write( "x = 0<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );