Chapter 4, Problem 14CR

To determine

To graph: the given function rule and then to tell whether the graph is continuous.

Explanation of Solution

Given information:

The given function rule is $n=24-2t$

Graph:

  $\begin{array}{l}n=24-2t\\ t=0\Rightarrow 24\\ t=1\Rightarrow 22\\ t=2\Rightarrow 20\\ t=3\Rightarrow 18\\ \end{array}$

The graph of the given function is shown below

  

The above graph is defined at distinct values of t.

Hence, the given function is discrete.