![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
Observe the graph:
\a. Find the end behavior.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=81fa336827f10c7c1b0e0140f7b05677.png\")
Therefore leading coefficient is positive.
\b. Degree of the function.
\Since end behavior is in same direction, it is even degree polynomial function.
\c. Find the number of real zeros.
\There are four ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8da2268e35b6b6daab9c47f71c4c8bf4.png\")
-intercepts and it has four real zeros.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
Option C is right choice.