document.write( "Question 163079: I'm having some trouble with this :
\n" ); document.write( "What is the equation of a parabola with vertex (0,0) and focus (0,4)
\n" ); document.write( "I think it needs to be ax^2 + bx + c = 0 But I'm lost!!! Can anybody get me started??? \n" ); document.write( "

Algebra.Com's Answer #120168 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
The general equation for a parabola is
\n" ); document.write( " $\"4p%28y-k%29=%28x-h%29%5E2\"$
\n" ); document.write( "where (h,k) is the vertex, and p is the distance from vertex to focus.
\n" ); document.write( "In your case, (h,k)=(0,0) and p=4,
\n" ); document.write( " $\"4p%28y-k%29=%28x-h%29%5E2\"$
\n" ); document.write( " $\"4%284%29%28y%29=%28x%29%5E2\"$
\n" ); document.write( " $\"y=x%5E2%2F16\"$ \n" ); document.write( "

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