Question

What is the `y`-coordinate of the vertex of the parabolic graph of `fx)=ax^2 + bx + c`?

Answer 1

See explanation below.

Explanation:

The `y`-coordinate can be be found only after the `x`-coordinate is found.

To find the `x`-coordinate, use the following formula:

`-\frac{b}{2a}`

Then, plug that value into the equation `ax^2+bx+c` for `x`, and that will give you the `y`-coordinate.