### Home > PC > Chapter 6 > Lesson 6.2.2 > Problem 6-84

6-84.

Below is a graph of a periodic function and the line

*y*= 5. One of the intersection points is (11.31, 5). Homework Help ✎What is the period of the function?

Use the symmetry of the graph to find the coordinate of the intersection labeled as point

*B*.What is the coordinate for the point labeled

*C*?

Set up an equation involving *B*.

15 − 11.31 = *B* − 15

Set up an equation involving *C*.

11.31 − 5 = 5 − *C*