### Home > A2C > Chapter 4 > Lesson 4.1.3 > Problem 4-40

4-40.

Find the vertex of each of the following parabolas by averaging the -intercepts. Then write each equation 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).