Find the equation of the parabola in each of the following cases: the vertex at (0,0) the parabola opens downwards and the latus rectum of length 10.

Explanation

Vertex at (0,0) parabola opens downward length of the latus rectum is 10. `therefore` 4a=10
`therefore` Eqn of the parabola is `x^2=-4ay` or `x^2=-10y`