write an equation for the parabola with focus at (0, -2) and directrix x = 2
write an equation of the parabola with vertex (3,1) and focus (3,5)
write an equation for the parabola with vertex (5,-2) and 0=-5
y = 2x ^ 2 - 8x - 3y + 7; identify the vertex, focus, directrix, and the direction the parabola opens.