document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1116307>Question 1116307</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The path that a motorcross dirt bike rider follows during a jump is given by y=-0.4x^2+4x+10 where x is the horizontal distance in feet from the edge of the ramp and y is the height in feet.\r<BR>\n" );
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document.write( "a.Graph the function on a coordinate plane<BR>\n" );
document.write( "b.What is the maximum height of the rider during the jump? Explain how you know. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #731295 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=731295\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The path that a motorcross dirt bike rider follows during a jump is given by y=-0.4x^2+4x+10 where x is the horizontal distance in feet from the edge of the ramp and y is the height in feet.\r<BR>\n" );
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document.write( "a.Graph the function on a coordinate plane<BR>\n" );
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document.write( "Pick values for x and find y.<BR>\n" );
document.write( "Plot the points.<BR>\n" );
document.write( "Draw a curve thru them.<BR>\n" );
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document.write( "b.What is the maximum height of the rider during the jump?<BR>\n" );
document.write( "It's the vertex of the parabola at x = -b/2a = -4/-0.8 = 5<BR>\n" );
document.write( "y=-0.4x^2+4x+10 = -0.4*25 + 4*5 + 10 = 20 feet<BR>\n" );
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document.write( " Explain how you know.<BR>\n" );
document.write( "How I know what? </SPAN>\n" );
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