Question

For all functions of the form f(x) = ax^2 + bx + c, which is true when b=0

Answer 1

The y-intercept will always be the vertex of the function.

Explanation:

The functions with the following form
`f(x) = ax^2 + bx + c` are quadratic equations and have a parabolic form, which means the have a vertex. The x coordinate of the vertex is given by the following expression
`x = (-b)/(2*a)`. When b is equal to zero, the vertex of the function will always be the y-intercept, therefore the correct answer is the third one.