document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=284117>Question 284117</A>: <I><SPAN STYLE=\"word-break: break-all;\"> how do I graph f(x)=-3x2 + 8x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #206264 by </B><A HREF=/tutors/aboutme.mpl?userid=nyc_function><B>nyc_function(2741)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nyc_function><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=nyc_function><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=206264\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is an upside down parabola.\r<BR>\n" );
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document.write( "Just select about 6 different values for x and then simplify to find y values that together make points in the form (x,y).\r<BR>\n" );
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document.write( "Let y = f(x).\r<BR>\n" );
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document.write( "y = -3x^2 + 8x\r<BR>\n" );
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document.write( "For example, if x = 0, find y.\r<BR>\n" );
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document.write( "y = -3(0)^2 + 8(0)\r<BR>\n" );
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document.write( "y = 0 + 0\r<BR>\n" );
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document.write( "y = 0\r<BR>\n" );
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document.write( "This makes the point (0,0).  You can now plot this point on the xy-plane.\r<BR>\n" );
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document.write( "Find other points in the same way.  When you have about 5 or 6 points, plot each point and then connect them with a smooth curve.\r<BR>\n" );
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document.write( "Can you finish now?\r<BR>\n" );
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document.write( " </SPAN>\n" );
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