### Home > AC > Chapter 12 > Lesson 12.4.1 > Problem 12-68

12-68.

Graph the function

Domain is all of the values of that give a real answer.

Range is all real values that are possible answers.

You cannot take the square root of a negative number and get a real answer.

What numbers could be that would make the number under the square root sign negative?

How can you describe what numbers

*has to be to get a real answer?*

Taking a square root gives a positive number.

There is a negative sign in front of the square root.

What does this tell you about the possible answers?

Domain:

Range:

Use the eTool below to graph the function and describe the domain and range.

Click on the link at right for the full eTool version: *12-68 HW eTool*