document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1000515>Question 1000515</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose you throw a ball over a 10-ft fence. Barely clearing the fence, the ball reaches its highest point directly above the fence and lands 10 ft from the fence. Using the fence as the axis of symmetry, write a quadratic function that models the ball’s height. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #617960 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=617960\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Parabola shape, opening downward so the vertex is a maximum, at  (0,10).  Using behind the fence at ground level to be a zero then other side of fence where ball lands is the other zero.  These are  (-10,0) and (10,0).\r<BR>\n" );
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document.write( "The function would be  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p%28x%29=a%28x%2B10%29%28x-10%29 ALIGN=MIDDLE  ALT=\"p%28x%29=a%28x%2B10%29%28x-10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and use the vertex to find the factor, a.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=10=a%280%2B10%29%280-10%29 ALIGN=MIDDLE  ALT=\"10=a%280%2B10%29%280-10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a%2810%29%28-10%29=10 ALIGN=MIDDLE  ALT=\"a%2810%29%28-10%29=10\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a=-%281%2F10%29 ALIGN=MIDDLE  ALT=\"a=-%281%2F10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p%28x%29=-%281%2F10%29%28x-10%29%28x%2B10%29 ALIGN=MIDDLE  ALT=\"p%28x%29=-%281%2F10%29%28x-10%29%28x%2B10%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, factored form. </SPAN>\n" );
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