document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1033490>Question 1033490</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find an equation of the parabola that has the indicated vertex and whose graph passes through the given point<BR>\n" );
document.write( "Vertex: (2, -1); point: (4, -3)<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #648109 by </B><A HREF=/tutors/aboutme.mpl?userid=FrankM><B>FrankM(1040)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=FrankM><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=FrankM><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=648109\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Vertex form -\r<BR>\n" );
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document.write( "y-k=a(x-h)^2\r<BR>\n" );
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document.write( "enter the given vertex -\r<BR>\n" );
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document.write( "y+1=a(x-2)^2     (<<< you see why it's y+1.  y- (-1) is y+1)\r<BR>\n" );
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document.write( "Now we have the equation with one unknown to solve, \"a\". So use the given point.\r<BR>\n" );
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document.write( "-3+1=a(4-2)^2\r<BR>\n" );
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document.write( "-2=a *4\r<BR>\n" );
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document.write( "a= -1/2\r<BR>\n" );
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document.write( "y+1=-1/2(x-2)^2 \r<BR>\n" );
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document.write( "A graph to help illustrate the results \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/display-illustration.mpl?tutor=FrankM&illustration_name=Screen_shot_2016_05_08_at_12.14.31_PM.jpg\"> </SPAN>\n" );
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