Question 1023873
I sketched {{{y=-((x-25)/25)^2+25}}}

It graphs to this -

*[illustration Screen_shot_2016_03_08_at_8.56.45_AM.png]


And can represent a kicked football. The vertex is at 25 ft high, the maximum height it reached, and it goes 50 ft before hitting the ground. It was a young child, by the way.