### Home > INT3 > Chapter 2 > Lesson 2.2.1 > Problem 2-31

2-31.

What are the

‑ and‑intercepts?To find the

-intercept, substitutefor .To find the

-intercepts, factor the equation and substitutefor .The

-intercept isand the -intercepts areand Where is the line of symmetry of this parabola? Write its equation.

To find the line of symmetry, average the

values of the-intercepts.

What are the coordinates of the vertex?

Substitute the

value for the line of symmetry into the equation.

Use the eTool below to graph the equation.

Click the link at right for the full version of the eTool:* **INT3 2-31 HW eTool*