Write the equation of a parabola whose directrix is x=4 and has a focus at (-6,-5).
Write the equation of a parabola whose directrix is y=2 and has a focus at (3,10).
Find the equation for the parabola that has its focus at (-3,2) and has directrix y=6.
Find the equation for the parabola that has its vertex at the origin and has directrix at x=-1/43.
Find an equation for the parabola that has its vertex at the origin and has its focus at the point (0,-6.4).
