Chapter 2 - Section 2.6 - Graphs of Basic Functions - 2.6 Exercises - Page 239: 9

(B) Range: {...,-4,-3,-2,-1,0,1,2,3,4,...}

Graph B has many discontinuities because it is a step function. Its range consists of positive and negative whole values (because it rounds each number) including zero: Range: {...,-4,-3,-2,-1,0,1,2,3,4,...}