Question 40448
From the information we can tell that the vertex is at the origin.
P = 1/(4a) when {{{P}}} is the distance from the vertex to the focus and from the vertex to the directrix
5 = 1/(4a)
20a = 1
a = (1/20)
Use:
{{{y = a(x - h)^2 + k}}}
{{{y = (1/20)(x)^2}}}
For another point, pick {{{x = 1}}} ....
{{{y = (1/20)(1)^2}}}
{{{y = (1/20)}}}
*[invoke quadratic "x", 0.05, 0, 0]