document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1206388>Question 1206388</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Which quadratic function in vertex from can be represented by the graph that has the vertex at (0, -4) and passes through the point (3, -7)?\r<BR>\n" );
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document.write( "A. y = -1/3x^2 - 4\r<BR>\n" );
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document.write( "B. y = 1/3(x + 4)^2\r<BR>\n" );
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document.write( "C. y = 1/3x^2 - 4<BR>\n" );
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document.write( "D. y = -1/3(x + 4)^2 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #843823 by </B><A HREF=/tutors/aboutme.mpl?userid=ikleyn><B>ikleyn(52866)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ikleyn><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=ikleyn><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=843823\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> .<BR>\n" );
document.write( "Which quadratic function in vertex from can be represented by the graph <BR>\n" );
document.write( "that has the vertex at (0, -4) and passes through the point (3, -7)?<BR>\n" );
document.write( "A. y = -1/3x^2 - 4<BR>\n" );
document.write( "B. y = 1/3(x + 4)^2<BR>\n" );
document.write( "C. y = 1/3x^2 - 4<BR>\n" );
document.write( "D. y = -1/3(x + 4)^2<BR>\n" );
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document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This problem is not to make long calculations.<BR>\n" );
document.write( "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;It is to be solved &nbsp;MENTALLY &nbsp;in your head, giving a correct answer in one second.\r<BR>\n" );
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document.write( "<PRE STYLE=\"white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;\">\r\n" );
document.write( "The word \"Which\" in the question means \"find/identify one in the list\".\r\n" );
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document.write( "The vertext at (0,-4) means that the choice is between (A) and (C),\r\n" );
document.write( "since (B) and (D) have vertex at x = -4.\r\n" );
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document.write( "Looking at the point (3,-7) , you see that it lies BELOW the level y= -4;\r\n" );
document.write( "hence, the parabola must be opened downward.\r\n" );
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document.write( "It implies that the <U>ANSWER</U> is (A).\r\n" );
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document.write( "For reability, you can check it: y = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-1%2F3%29%2A3%5E2-4 ALIGN=MIDDLE  ALT=\"%28-1%2F3%29%2A3%5E2-4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28-1%2F3%29%2A9-4 ALIGN=MIDDLE  ALT=\"%28-1%2F3%29%2A9-4\"   DISABLED_style= \"max-width:90%; height:auto;\" > = -3 -4 = -7.   ! correct !\r\n" );
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document.write( "Solved.\r<BR>\n" );
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document.write( "Once again: the point of this task is to provide a correct answer quicker than you blink an eye.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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