document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=749246>Question 749246</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Have a project with Angry Birds where you have to find the equation of a parabola for the bird's flight path in various situations. I have to pick a point at the origin and a pint on the x axis for the pig to be placed and find the flight path (equation). How would i do this? I chose for points:\r<BR>\n" );
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document.write( "Bird placed at (0,0)<BR>\n" );
document.write( "Pig placed at (5,0)<BR>\n" );
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document.write( "I dont understand what to do after this please help. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #455895 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=455895\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Have a project with Angry Birds where you have to find the equation of a parabola for the bird's flight path in various situations. <BR>\n" );
document.write( "I have to pick a point at the origin and a point on the x axis for the pig to be placed and find the flight path (equation).<BR>\n" );
document.write( " How would i do this? I chose for points:<BR>\n" );
document.write( "Bird placed at (0,0)<BR>\n" );
document.write( "Pig placed at (5,0)<BR>\n" );
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document.write( "We need another point, 0,0 is of no use, lets choose 3,4 as a point<BR>\n" );
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document.write( "Using the form ax^2 + bx + c = y<BR>\n" );
document.write( "We are using origin so we can ignore c, just find a and b<BR>\n" );
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document.write( "Write an equation for each point, find a and b<BR>\n" );
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document.write( "Point: 5,0<BR>\n" );
document.write( "25a + 5b = 0<BR>\n" );
document.write( "and<BR>\n" );
document.write( "Point 3,4<BR>\n" );
document.write( "9a + 3b = 4<BR>\n" );
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document.write( "Multiply the 1st equation by 3, the 2nd equation by 5<BR>\n" );
document.write( "75a + 15b = 0<BR>\n" );
document.write( "45a + 15b = 20<BR>\n" );
document.write( "------------------subtraction eliminates b, find a<BR>\n" );
document.write( "30a = -20<BR>\n" );
document.write( "a = -20/30<BR>\n" );
document.write( "a = -.67<BR>\n" );
document.write( "Use the 1st equation to find b<BR>\n" );
document.write( "25(-.67) + 5b = 0<BR>\n" );
document.write( "-16.67 + 5b = =<BR>\n" );
document.write( "5b = 16.67<BR>\n" );
document.write( "b = 16.67/5<BR>\n" );
document.write( "b = 3.33<BR>\n" );
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document.write( "The equation: y = -.67x^2 + 3.33x<BR>\n" );
document.write( "looks like this<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+300%2C+200%2C+-2%2C+8%2C+-2%2C+6%2C+-.67x%5E2%2B3.33x%29+ ALIGN=MIDDLE  ALT=\"+graph%28+300%2C+200%2C+-2%2C+8%2C+-2%2C+6%2C+-.67x%5E2%2B3.33x%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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