Textbook Problem

In Problems 1 and 2, refer to the figure. For each given x-value, use the figure to determine whether the function is continuous or discontinuous at that x-value. If the function is discontinuous, state which of the three conditions that define continuity is not satisfied.

(a) $x=-5$

(b) $x=1$

(c) $x=3$

(d) $x=0$