Question 1191210
Opens downward, vertex being a maximum point.  If you know the formula for the equation to plug in the values given, then that is one option.  Otherwise you can use the Distance Formula definition for a parabola.


{{{(x-0)^2+(y-(-5))^2=(x-x)^2+(y-5)^2}}}

{{{x^2+(y+5)^2=(y-5)^2}}}

{{{x^2+y^2+10y+25=y^2-10y+25}}}

{{{x^2+10y=-10y}}}

{{{highlight(x^2=-20y)}}}


{{{graph(400,400,-7,7,-7,7,-x^2/20)}}}