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Home > CCA > Chapter 11 > Lesson 11.3.1 > Problem 11-77


Graph the function . Use inequalities to describe its domain and range.  

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?


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: 11-77 HW eTool