### Home > A2C > Chapter 9 > Lesson 9.1.1 > Problem 9-21

9-21.

Sketch a graph of

*y*=*x*^{2}− 7. Homework Help ✎How many roots does this graph have?

What are the roots of the function?

How many times does the graph intersect the *x*-axis?

9-21.

Sketch a graph of

*y*=*x*^{2}− 7. Homework Help ✎How many roots does this graph have?

What are the roots of the function?

How many times does the graph intersect the *x*-axis?