Chapter 2 Linear Equations and Functions - Extension - Use Discrete and Continuous Functions - Practice - Page 81: 2

See the graph

We are given: $f(x)=0.5x-4$ Domain: $\{-4,-2,0,2,4\}$ Let's make a list of values: $x=-4 \rightarrow y=-6$ $x=-2 \rightarrow y=-5$ $x=0 \rightarrow y=-4$ $x=2 \rightarrow y=-3$ $x=4 \rightarrow y=-2$ The graph consists of separate points, so the function is discrete. The range is $\{-6,-5,-4,-3,-2\}$.