### Home > A2C > Chapter 13 > Lesson 13.1.1 > Problem 13-9

13-9.

Sketch a graph. What is the smallest *x*-value you can use before the number under the radical sign becomes negative?

What is the smallest *y*-value that can result from this equation?

Remember that in an inverse, *x* and *y* are interchanged. Reverse the domain and range you found in part (a).