Question

Create a quadratic function in which f(x) ≥ 0 for values of x between 2 and 6 inclusive.

Answer 1

if the parabola opens downward, it is positive between the roots. Draw one and see. So, for any negative value of a,
y = a(x-2)(x-6) ≥ 0 on the interval [2,6]

Answer 2

@oobleck can you clarify your answer please. How can there be both an equal sign and a comparison sign in one equation?