### Home > CALC > Chapter 8 > Lesson 8.2.1 > Problem 8-72

8-72.

**Multiple Choice: **The function , whose graph consists of two line segments, is shown at right. Which of the following are true for

*on the open interval*

The domain of the derivative of

is the open interval. Is there anywhere within

in which the derivative does not exist?*f*is continuous on the open interval. Check all three conditions of continuity.

The derivative of

is positive on the open interval. A positive derivative means that

is increasing.

I only

II only

III only

II & III only

I, II & III