document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=547006>Question 547006</A>: <I><SPAN STYLE=\"word-break: break-all;\"> So if I am given a graphy how do I find f(x)?\r<BR>\n" );
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document.write( "Please help me.  I came up with 2 possilbe answers.\r<BR>\n" );
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document.write( "For example, f(2) is I find 2 on the x axis and find where it touches the graph and the f(x) is the y?\r<BR>\n" );
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document.write( "Or I find2 on the y axis and find where it touches the graph and the f(x) is the x?\r<BR>\n" );
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document.write( "Please plase please help me! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #356266 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=356266\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let's use an example<BR>\n" );
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document.write( "Say your told to graph f(x) = x^2 - 8x + 12<BR>\n" );
document.write( "on a graph, f(x) = y, therefore rewrite the equation to<BR>\n" );
document.write( "y = x^2 - 8x + 12<BR>\n" );
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document.write( "When they say f(2), they mean find the value of y when x=2<BR>\n" );
document.write( "When they say f(1), they mean find the value of y when x=1<BR>\n" );
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document.write( "find the points on the graph from +1 to + 7<BR>\n" );
document.write( "f(1); x=1, replace x with 1 and find y<BR>\n" );
document.write( "y = 1^2 - 8(1) + 12<BR>\n" );
document.write( "y = 1 - 8 + 12<BR>\n" );
document.write( "y = 5<BR>\n" );
document.write( "The ordered x,y pair: 1, 5<BR>\n" );
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document.write( "do the same with f(3); x=3<BR>\n" );
document.write( "y = 3^2 - 8(3) + 12<BR>\n" );
document.write( "y = 9 - 24 + 12<BR>\n" );
document.write( "y = -3<BR>\n" );
document.write( "The ordered pair: 3, -3<BR>\n" );
document.write( "We can make a table from doing this, doing the same for each value of x, find y<BR>\n" );
document.write( " x | y<BR>\n" );
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document.write( " 1 | +5<BR>\n" );
document.write( " 2 | 0 <BR>\n" );
document.write( " 3 | -3<BR>\n" );
document.write( " 4 | -4<BR>\n" );
document.write( " 5 | -3<BR>\n" );
document.write( " 6 | 0<BR>\n" );
document.write( " 7 | +5<BR>\n" );
document.write( " choose the values for x, in the range that will give a meaningful graph, graph each point.<BR>\n" );
document.write( "this equation should look like this<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+300%2C+200%2C+-4%2C+10%2C+-10%2C+14%2C+x%5E2-8x%2B12%29+ ALIGN=MIDDLE  ALT=\"+graph%28+300%2C+200%2C+-4%2C+10%2C+-10%2C+14%2C+x%5E2-8x%2B12%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Look at the table and you can see that it agrees with the x,y value on the graph<BR>\n" );
document.write( "Just remember that in graphing, f(x) just means y<BR>\n" );
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document.write( "Did this help, any questions?  </SPAN>\n" );
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