Question: In Problems 2128, determine whether each function is linear or nonlinear. If it is linear, determine the slope. X -2 -1 0 1 2 y
In Problems 21–28, determine whether each function is linear or nonlinear. If it is linear, determine the slope.

X -2 -1 0 1 2 y = f(x) - 4 0 4 8 12
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