The function is linear. Slope $= 4$
Work Step by Step
A function is linear if there is a constant rate of change of the function, which is also called the slope. Note that: $0=-4+4\\ 4=0+4\\ 8=4+4\\ 12=8+4$ Hence. the difference of all consecutive $y$-values is $4$, which means that the slope is $4$. Thus, the function is linear.