### Home > INT3 > Chapter 2 > Lesson 2.1.1 > Problem 2-7

2-7.

Determine the vertex of each of the following parabolas by averaging the ‑intercepts. Then write each function in graphing form.

What are the

-intercepts of this equation? After finding them, average the-coordinates to find the-value, and then substitute this value into the equation to find the corresponding-value.-intercepts:and

vertex:equation:

Refer to part (a).

-intercepts:and

vertex:equation:

Refer to part (a).

-intercepts:and

vertex:equation:

First square

and combine like terms. Refer to part (a).