Question

Create a quadratic function, f(x) in vertex form. The a should be between 4 and -4, the h will be your birth month and the k will be your birth day.

my birthday is 2/22, how do i solve for "a" from here? f(x)=a(x-2)^2+22.

Answer 1

You can't solve for a unless they give you a point on the curve.

Here you can choose any a as long as it is between 4 and -4.

Answer 2

If you choose a = 1, then f(x) = (x - 2)^2 + 22.
This satisfies all the conditions they state in the problem.

You can choose a = 3, then f(x) = 3(x - 2)^2 + 22.

They should all be acceptable answers.