document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=970768>Question 970768</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A Rock is launched from a cannon. Its height, h(x), can be represented by a quadratic function in terms of time, x, in seconds.<BR>\n" );
document.write( "After 1 second, the rock is 129 feet in the air; after 2 seconds it is 236 feet in the air. <BR>\n" );
document.write( "Find the height, in feet, of the rock after 5 seconds in the air. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #593456 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=593456\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A possible good model for this can be  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h%28x%29=a%2Ax%5E2 ALIGN=MIDDLE  ALT=\"h%28x%29=a%2Ax%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "x_______h<BR>\n" );
document.write( "1______129<BR>\n" );
document.write( "2______236\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28a%2A1%5E2=129%2Ca%2A2%5E2=236%29 ALIGN=MIDDLE  ALT=\"system%28a%2A1%5E2=129%2Ca%2A2%5E2=236%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=a=129%2C4a=236 ALIGN=MIDDLE  ALT=\"a=129%2C4a=236\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=a=59 ALIGN=MIDDLE  ALT=\"a=59\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Not consistent.\r<BR>\n" );
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document.write( "Try another model:   <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h=ax%5E2%2Bk ALIGN=MIDDLE  ALT=\"h=ax%5E2%2Bk\"   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=system%28a%2A1%5E2%2Bk=129%2Ca%2A2%5E2%2Bk=236%29 ALIGN=MIDDLE  ALT=\"system%28a%2A1%5E2%2Bk=129%2Ca%2A2%5E2%2Bk=236%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "-<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=system%28a%2Bk=129%2C4a%2Bk=236%29 ALIGN=MIDDLE  ALT=\"system%28a%2Bk=129%2C4a%2Bk=236%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "This one will give <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28a=107%2F3%29 ALIGN=MIDDLE  ALT=\"highlight%28a=107%2F3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and this can be used in either equation to evaluate k. </SPAN>\n" );
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