well, recall that a parabola with vertex at (h,k) is
y-k = a(x-h)^2
and for the focus, take a peek at
http://www.purplemath.com/modules/parabola.htm
For each parabola, find the vertex and focus.
x= (1/400)y^2
y= 1/8(x-3)^2-1
1 answer