Question

Write a function that represents a parabola that opens upward and has a vertex of (9,11)

Answer 1

vertex form of equation of parabola:

y-k = a(x-h)^2, where (h,k) is the vertex. Here h=9 and k=11.

Then y-11 = a(x-9)^2 or y = a(x-9)^2 + 11

If the coefficient of the (x-9)^2 term is 1, then y = (x-9)^2 + 11.